Changing SRAM Apex brifters to flat bar - which is it possible to get hydraulic brake levers and trigger shifters to match?

I’ve got a Tempest gravel bike from Planet X that came with drops and the Apex HRD groups. It works well but the whole drop handle bar positioning is a very literal pain — I ended up with crucifying back pain while touring East Germany last summer.
I want to change to a Jones bar (like a riser bar but with greater choice of hand and body positions) yet can’t find a simple way to transfer the brake and gear shifter. The only option seems to be to change the entire Apex drive train, which is very expensive.
Any advice?