That was a limitation of our Android-only Classic platform. The current, cross-platform version of Thunkable has no such limitation, you’re free to have as many screens as you want.
From a maintenance perspective though, you probably don’t want 30 screens since it makes updates unnecessarily time consuming.
How about taking a more dynamic, data-drive approach such as this:
There are only 2 screens in this app (1 for content and 1 for the menu) but from the users perspective there are 6 screens. Similarly, this “A - Z of Thunkable” app uses the same approach to condense 30+ screens of content into just 3: