I was looking for somewhere I could run web services and cron jobs both in the same place.
They have a Heroku importer, however I think you need to ask to have it turned on. I found that it was easier for me to build docker images for my apps and use a 'build service' instead however. YMMV
I found their support to be very responsive and enjoy using their UI. The UI, builds and so on all feel very fast.
Northflank can run databases, however for my databases I've been running them on ElephantSQL for some time (https://www.elephantsql.com) - even when I was on Heroku.
Free for Dev's PaaS list is worth a review: https://free-for.dev/#/?id=paas