I can’t recommend Affinity enough. It’s well worth the spend. It really shines as a complete set of integrated tools, even on an old iPad! That’s what Adobe is up against, IMO. The brushes could use some work, but if you’re looking for missing features, I suggest taking a look at Vectornator[^1], which has Auto-trace and brushes at a reasonable price. (no affiliation)

[^1]: https://www.vectornator.io/