Thibaultmol What is possible would be to add shortcuts to specific models that have seen recent usage (e.g., like the Google Messages app does for recent text conversations). That way, if the user wants to create home screen shortcuts to many different models (for whatever reason), they could use a model, drag out the shortcut, use a different model, drag out the shortcut, etc.
More realistically though, it's not that I think there are lots of people who want shortcuts to many different models (although that is probably a reasonable use case if you use lots of custom prompts), it's that lots of people would benefit from a shortcut to whatever model they used most recently.