Analog Lab Play comes with 100 factory presets.
If you want to have access to more presets, you can download sound banks from the "Discover more sounds" section.
To go to the "Discover more sounds" section, click on the "books on the shelf" icon in the Main view.
To display the banks in a more convenient manner, you can click on "Show all".
This way, you'll be able to use the search bar to search banks, and to search by types using the search terms underneath.
By clicking on "Free", you're going to have access to 8 free sound banks. Download them and try them out !
For the other sound banks, you can try some of their presets before buying them.
If you're satisfied with the freely accessible sounds (framed in red), and that you buy the bank, you'll have access to all the other amazing presets from the said bank (marked with a lock).
Give it a go !