dvipdfmx fails to find pdftex.map / kanjix.map in a fresh install-tl distro

UPD: I added full repro scripts at https://gist.github.com/vadimkantorov/cb638c61afc2fb4526d05e6c4c3b48b6

The warninngs of dvidpfmx:

warning: Couldn't open font map file "pdftex.map".
warning: Couldn't open font map file "kanjix.map".

How do I get rid of these warnings? Is it a problem with the recent install-tl that places font maps into texlive/texmf-var/fonts/map/pdftex/updmap/, but does not mention updmap in TEXFONTMAPS definition in texlive/texmf-dist/web2c/texmf.cnf? Should I patch it manually?

The font maps are produced in texlive/texmf-var, but texmf-var is not found at all in TEXFONTMAPS definition. It seems that something is wrong with both TEXMFVAR/TEXMFSYSVAR setup and with updmap suffix.

I install TexLive as follows into ./texlive and use a custom-built kpsewhich (I have no system-wide install), I do not do any manual calls of updmap:

URL_TEXLIVE_INSTALLER=http://mirror.ctan.org/systems/texlive/tlnet/install-tl-unx.tar.gz

wget --no-clobber $URL_TEXLIVE_INSTALLER
mkdir -p install-tl
tar -xf install-tl-unx.tar.gz --strip-components=1 --directory=install-tl

echo selected_scheme scheme-basic > install-tl.profile
echo TEXDIR $PWD/texlive >> install-tl.profile
echo TEXMFLOCAL $PWD/texlive/texmf-local >> install-tl.profile
echo TEXMFSYSVAR $PWD/texlive/texmf-var >> install-tl.profile
echo TEXMFSYSCONFIG $PWD/texlive/texmf-config >> install-tl.profile
TEXLIVE_INSTALL_NO_RESUME=1 $PWD/install-tl/install-tl -profile install-tl.profile

pdftex.map and kanjix.map are found in the TexLive tree, but the texmf.cnf does not contain updmap directory:

export TEXMFCNF=$PWD/texlive/texmf-dist/web2c
export TEXMFDIST=$PWD/texlive/texmf-dist
kpsewhich -debug 32 pdftex.map

# kdebug:start search(xname=texmf.cnf, must_exist=1, find_all=1, path=/mnt/c/Users/user/busytex/bug/texlive/texmf-dist/web2c).
# kdebug: path_search(file=texmf.cnf, must_exist=1, find_all=1, path=/mnt/c/Users/user/busytex/bug/texlive/texmf-dist/web2c)
# kdebug:  dir_list_search(file=texmf.cnf, find_all=1, casefold=no)
# kdebug:start generic search(files=[ls-r ls-R], must_exist=1, find_all=1, path=/mnt/c/Users/texmf-local:/mnt/c/Users/user/texmf-config:/mnt/c/Users/user/texmf-var:/mnt/c/Users/user/busytex/bug/texlive/texmf-dist)
# kdebug:  dir_list_search_list(files=[ls-r ls-R], find_all=1, casefold=no)
# kdebug:returning from generic search([ls-r ls-R]) => /mnt/c/Users/user/busytex/bug/texlive/texmf-dist/ls-r /mnt/c/Users/user/busytex/bug/texlive/texmf-dist/ls-R
# kdebug:start search(xname=aliases, must_exist=1, find_all=1, path=/mnt/c/Users/texmf-local:/mnt/c/Users/user/texmf-config:/mnt/c/Users/user/texmf-var:/mnt/c/Users/user/busytex/bug/texlive/texmf-dist).
# kdebug: path_search(file=aliases, must_exist=1, find_all=1, path=/mnt/c/Users/texmf-local:/mnt/c/Users/user/texmf-config:/mnt/c/Users/user/texmf-var:/mnt/c/Users/user/busytex/bug/texlive/texmf-dist)
# kdebug:  dir_list_search(file=aliases, find_all=1, casefold=no)
# kdebug:  dir_list_search(file=aliases, find_all=1, casefold=yes)
# kdebug:   casefold_readable_file(aliases) in /mnt/c/Users/user/busytex/bug/texlive/texmf-dist => (nil)
# kdebug:returning from search(aliases) =>
# kdebug:kpse_find_file: searching for pdftex.map of type map (from texmf.cnf)
# kdebug:start generic search(files=[pdftex.map], must_exist=0, find_all=0, path=.:/home/vadimkantorov/.texlive2020/texmf-config/fonts/map/busytex//:/home/vadimkantorov/.texlive2020/texmf-var/fonts/map/busytex//:/home/vadimkantorov/texmf/fonts/map/busytex//:!!/mnt/c/Users/texmf-local/fonts/map/busytex//:!!/mnt/c/Users/user/texmf-config/fonts/map/busytex//:!!/mnt/c/Users/user/texmf-var/fonts/map/busytex//:!!/mnt/c/Users/user/busytex/bug/texlive/texmf-dist/fonts/map/busytex//:/home/vadimkantorov/.texlive2020/texmf-config/fonts/map/pdftex//:/home/vadimkantorov/.texlive2020/texmf-var/fonts/map/pdftex//:/home/vadimkantorov/texmf/fonts/map/pdftex//:!!/mnt/c/Users/texmf-local/fonts/map/pdftex//:!!/mnt/c/Users/user/texmf-config/fonts/map/pdftex//:!!/mnt/c/Users/user/texmf-var/fonts/map/pdftex//:!!/mnt/c/Users/user/busytex/bug/texlive/texmf-dist/fonts/map/pdftex//:/home/vadimkantorov/.texlive2020/texmf-config/fonts/map/dvips//:/home/vadimkantorov/.texlive2020/texmf-var/fonts/map/dvips//:/home/vadimkantorov/texmf/fonts/map/dvips//:!!/mnt/c/Users/texmf-local/fonts/map/dvips//:!!/mnt/c/Users/user/texmf-config/fonts/map/dvips//:!!/mnt/c/Users/user/texmf-var/fonts/map/dvips//:!!/mnt/c/Users/user/busytex/bug/texlive/texmf-dist/fonts/map/dvips//:/home/vadimkantorov/.texlive2020/texmf-config/fonts/map///:/home/vadimkantorov/.texlive2020/texmf-var/fonts/map///:/home/vadimkantorov/texmf/fonts/map///:!!/mnt/c/Users/texmf-local/fonts/map///:!!/mnt/c/Users/user/texmf-config/fonts/map///:!!/mnt/c/Users/user/texmf-var/fonts/map///:!!/mnt/c/Users/user/busytex/bug/texlive/texmf-dist/fonts/map///)
# kdebug:  dir_list_search_list(files=[pdftex.map], find_all=0, casefold=no)
# kdebug:  dir_list_search_list(files=[pdftex.map], find_all=0, casefold=yes)
# kdebug:   casefold_readable_file(pdftex.map) in . => (nil)
# kdebug:returning from generic search([pdftex.map]) =>

find texlive -name pdftex.map
# texlive/texmf-var/fonts/map/pdftex/updmap/pdftex.map

find texlive -name kanjix.map
# texlive/texmf-var/fonts/map/dvipdfmx/updmap/kanjix.map

find texlive -name texmf.cnf
# texlive/texmf-dist/web2c/texmf.cnf
# texlive/texmf.cnf

grep 'fonts/map' texlive/texmf-dist/web2c/texmf.cnf
# TEXFONTMAPS = $TEXMFDOTDIR;$TEXMF/fonts/map/{$progname,pdftex,dvips,}//