> there's no "managed SQLite" offering
It's just a file :) You can copy it to a remote server or use Litestream or whatever you want to do with a file.
> SQLite is not compatible with Heroku
Yeah, that's pretty annoying. Apparently fly.io is similar to Heroku but lets you use persistent disks — I've never used it though.
I'd love to see more "managed app server + sqlite" options, since a lot of the times the "managed database server" option from cloud hosts is kind of expensive. Send emails to Heroku and DigitalOcean and Google Computer platform. Tell the world!