Missing views template suggestions in reality not just what is shown for skins a module that adds additional suggestions
- views template suggestions drupal 9
Template override suggestions not working for specific views [#3280592] | Drupal.org
This is probably caused by Drupal core bug of not listing Views template suggestions, so Skins isn’t able to add its new ones.
[PP-1] Use hook_theme_suggestions in views [#2923634] | Drupal.org
Incorrect order and duplicate theme hook suggestions [#2752443] | Drupal.org
https://drupal.stackexchange.com/questions/249854/i-dont-see-views-theme-suggestions
Ideally we would use one of the core patches
But maybe we should add them manually in the meantime. Some references:
https://pixelthis.gr/content/drupal-9-adding-suggestions-views-and-preprocessing-them