I’d add [supabase](https://supabase.com/) to the list as well. They have some compelling hosted Postgres options.
Seconding fly.io. We moved a major global service to them and have been very pleased. It's especially nice to be able to provision many frontend servers close to our customers without going through the architectural woes of FaaS.
My only beef right now is the routing/autoscaling, which I believe they're in the process of improving.
Have a POC running on render.com’s free plan. Been very positive experience so far.