A user is not excluded from the Service Catalog. He is inactive.
I created a flow in the PAM which checks the user's inactivity sure that it exists within the ca_contact table and is within the 'inactive' = 1.
If the user already exists and it is inactive, this flow changes inactive to 0 (zero).
This is not an alternative 'elegant'. I wonder if there is a way to check if a user in the Service Catalog this inactive and active by PAM without having to use the feature to change fields in the database.