SXGs seem to be a newer version of AMP.
I am posting it here because some of the more technical people here (not me!) might be interested and how it could work with WordOps / nginx.
https://web.dev/signed-exchanges/
https://github.com/google/nginx-sxg-module
https://www.seroundtable.com/google-prefetch-signed-exchanges-sites-31502.html
Someone who actually knows what they are doing (not me!) might want to expirement.