You said you are at EBBR and Alyzia doesn't have the maximum score there, because it has been generically assigned with a basic score of 2 to all airports in France and Belgium so, if at EBBR there are other operators with a higher score, it's normal you will see only them.
I suggest reading the manual, page 90, which explains how the scoring system works.
And, of course, Page 39 of the manual, where the Operators page in the parking customization page is explained, because the selections you make there, will take precedence over the default scoring system, so you can set any operator(s) at any airport/terminal/gate.
Because, if you are using a GSX custom profile for that airport, and it has explicitly specified some custom operators there, if the profile was made before we added new ones, you'll never see the new ones, no matter what.