Database for mobile app (Thunkable)

i need to store and recover a lot of information from a database; Airtable is integrated very well but doesn’t support a huge amount of rows.
I do not like Firebase, especially because it is not easy to query it.
Have you experiences with others DB?

Many thanks

If you can pay a nominal fee, backendless is good

Or create your own

Google no code mongoDB api generator and play with that for a few days. (Or other similar queries)