Lenovo Legion Sling Bag, Waterproof Carrying Case Bag for Legion Go Gaming Console, Black, Custom Fit Console Carrier, Adjustable Shoulder Strap, Multiple Compartments, Durable and Stylish Design

Not sure if this is helpful, but I bought the Legion Sling Bag and it's large enough to fit my Go S and Switch 2 at the same time. Both of them are in Killswitch cases. My only complaint with it is that it only has the sling strap and no carry handle. https://www.amazon.com/Lenovo-Waterproof-Carrying-Adjustable-Compartments/dp/B0F7PJ4WSH