It's a nice feature in Ventura, but fiddly to toggle on/off. Some sort of accelerator would be great. Much requested on various forums, great oppty for BTT...?
One idea is this: Shortcut for Stage Manager for macOS Ventura in BBT – Mijalche Santa
@Andreas_Hegenberg is this possible? 
Fantastic! Thanks so much for getting back. I would not have found this...