Magento2 need to check if varnish cache is applied or not

How can I verify whether my Varnish Cache is properly configured or not.

Here are the things that appeared

1. page_cache is not getting regenerated
2. Site speed as per Google page speed is improved

My site is set on http://x.x.x.x & is redirected to https://x.x.xx.x

HTTP/1.1 200 OK
< Date: Wed, 22 Jul 2020 13:59:25 GMT
Date: Wed, 22 Jul 2020 13:59:25 GMT
< Server: Apache
Server: Apache
< Pragma: cache
Pragma: cache
< Cache-Control: max-age=86400, public, s-maxage=86400
Cache-Control: max-age=86400, public, s-maxage=86400
< Expires: Thu, 23 Jul 2020 13:59:26 GMT
Expires: Thu, 23 Jul 2020 13:59:26 GMT
< X-Magento-Tags: store,cms_b,cat_c,cat_c_38,cat_c_20,cat_c_41,cat_c_3,cat_c_58,cat_c_39,cms_b_,cms_b_31,cms_b_em0144-fashion-area-footer-inner-payment,cms_b_60,cms_b_em0144-jewelry-area-footer01-information-footer07,cms_b_48,cms_b_em0144-jewerly-main-slideshow,cms_b_52,cms_b_em0144-jewelry-top-banners,cms_b_54,cms_b_em0144-jewelry-area-main01-new-arrivals-grid12,cms_p_7
X-Magento-Tags: store,cms_b,cat_c,cat_c_38,cat_c_20,cat_c_41,cat_c_3,cat_c_58,cat_c_39,cms_b_,cms_b_31,cms_b_em0144-fashion-area-footer-inner-payment,cms_b_60,cms_b_em0144-jewelry-area-footer01-information-footer07,cms_b_48,cms_b_em0144-jewerly-main-slideshow,cms_b_52,cms_b_em0144-jewelry-top-banners,cms_b_54,cms_b_em0144-jewelry-area-main01-new-arrivals-grid12,cms_p_7
< X-Content-Type-Options: nosniff
X-Content-Type-Options: nosniff
< X-XSS-Protection: 1; mode=block
X-XSS-Protection: 1; mode=block
< X-Frame-Options: SAMEORIGIN
X-Frame-Options: SAMEORIGIN
< Set-Cookie: PHPSESSID=3fe21bcb4a2d0cd17f4304ff6c6346ca; expires=Wed, 22-Jul-2020 14:59:26 GMT; Max-Age=3600; path=/; domain=monogramshop.com.au; secure; HttpOnly
Set-Cookie: PHPSESSID=3fe21bcb4a2d0cd17f4304ff6c6346ca; expires=Wed, 22-Jul-2020 14:59:26 GMT; Max-Age=3600; path=/; domain=monogramshop.com.au; secure; HttpOnly
< Content-Length: 101554
Content-Length: 101554
< Vary: User-Agent
Vary: User-Agent
< Connection: keep-alive
Connection: keep-alive
< X-UA-Compatible: IE=edge
X-UA-Compatible: IE=edge
< Cache-Control: max-age=86400, private, must-revalidate
Cache-Control: max-age=86400, private, must-revalidate
< Content-Type: text/html; charset=UTF-8
Content-Type: text/html; charset=UTF-8

The above is output of curl -I -v –location-trusted ‘https://x.x.x/’

< HTTP/1.1 200 OK
HTTP/1.1 200 OK
< Date: Wed, 22 Jul 2020 14:02:19 GMT
Date: Wed, 22 Jul 2020 14:02:19 GMT
< Last-Modified: Mon, 07 Oct 2019 08:45:22 GMT
Last-Modified: Mon, 07 Oct 2019 08:45:22 GMT
< Accept-Ranges: bytes
Accept-Ranges: bytes
< Content-Type: text/html
Content-Type: text/html
< Content-Encoding: gzip
Content-Encoding: gzip
< Vary: Accept-Encoding
Vary: Accept-Encoding
< Pragma: no-cache
Pragma: no-cache
< Expires: -1
Expires: -1
< Cache-Control: no-store, no-cache, must-revalidate, max-age=0
Cache-Control: no-store, no-cache, must-revalidate, max-age=0
< Via: HTTP/1.1 forward.http.proxy:3128
Via: HTTP/1.1 forward.http.proxy:3128
< Connection: keep-alive
Connection: keep-alive

The above is output of curl -I -v –location-trusted ‘http://x.x.x/’