Steps:

1. New v3 installation
2. Go to config/packages/ezplatform.yaml
3. Add under default section:

        pagination:
              user_settings_limit: 2

according to the example in vendor/ezsystems/ezplatform-user/src/bundle/DependencyInjection/Configuration/Parser/Pagination.php
4. Clear cache
5. Log in to the application
6. Go to User settings

Actual result:

Nothing changes in User settings.

Expected result:

Pagination for user settings is displayed. 2 settings per page. If you place

        pagination:
              user_settings_limit: 2

under admin_group it works ok.