Not sure if it looks the same way on a tablet as a PC. Somewhere on the initial load screen it might show the 1.18.1 as the version you will load before hitting the play button.
On java there is a tab at the top called Installations. If I click on that it will give me a list of available versions to play. Hitting new installation, I can give it a name like "Famcraft", then under version select "release 1.17.1", followed by hitting the Create button. Then I can load the version for Famcraft.
As I said though, I don't know what it looks like from a tablet but hopefully it's similar enough to get you going