Thanks!
So, I found the problem and now the checklists are working!
First, I reinstalled the program and reset everything to default settings - it didn't help. Then I remembered your words and the text file with checklists, FBW_A320_Check.txt, which should be assigned to this aircraft. And I couldn't find it in the folder. So I just copied another checklist from the Fenix A320 and renamed it to FBW_A320_Check.txt. I started the program and voila - everything worked!
Thanks for the quick help. Now I'll figure out the program. Is it integrated with GSX Pro? I seem to have found commands in one document, but when I say, for example, "Request Catering," the catering is not called. As well as all other GSX functions.