That said, using a static frontend cached on a CDN in general improves initial pageload and cuts down on traffic to your server by a lot. Netlify makes this easy if you want to use React on the client (with NextJS).
With AppEngine you get direct access in one console to all the bells and whistles of Google Cloud, basically the same as the other infra giants. AWS has even more bells and whistles but I find its console more annoying.