Generatepress AMP compatibility issues

After the recent update of GP Premium 2.1.2, I noticed several issues with my website, mainly with mobile usability.

As far as I remember, GP is an AMP-friendly site(do correct me if I am wrong) and does not require extra AMP plugins. I don’t have proof but I do remember that back in June-July I was getting a green check in https://search.google.com/test/amp

However, the case is not the same and I started getting errors such as text being too small to read, and content is wider than the screen. So is there a problem going on with the Generatepress behind the bars? Please help.

The page I need help with: [log in to see the link]