Hello,
1) We have fixed Warnings that were related to our theme in the search console https://prnt.sc/1y9udni You added theme and store core plugin scripts to combine exclusions and it caused the problem. Also, we fixed “The key “” is not recognized and ignored.” error by editing parent theme header.php. We’ll include that fix in the next theme update
2) Issues with your robots.txt are not related to theme code https://prnt.sc/1y32ykq because robots.txt does not come with theme. You create that file by yourself.
Read this https://support.google.com/webmasters/thread/13268079/while-doing-a-google-mobile-friendly-test-error-https-googleads-g-doubleclick-net-pagead-viewthr?hl=en
If you need help with the correct robots.txt file we would recommend you hire SEO expert.
3) Tested your FID and it’s ok https://prnt.sc/1y9vs0r
Regards