The Framework laptop dimensions are:
15.85mm x 296.63mm x 228.98mm =
5/8 (.62) in x 11 43/64 (11.67) in. x 9 1/64 (9.01) in.
You want to look for laptop bags that fit the Microsoft Surface, HP Spectre X360, Lenovo Thinkpad X1, etc. They have 3:2 aspect screens.
tomtoc Laptop Shoulder Bag for 13.5 Inch New Microsoft Surface Laptop 4/3/2/1, Surface Book 3/2/1, 360 Protective Case Fit 13-inch Old MacBook Air/Pro, Acer Swift 3, Waterproof Accessory Sleeve Amazon.com: tomtoc Laptop Shoulder Bag for 14 Inch MacBook Pro M4/M3/M2/M1 Pro/Max 2024-2021, 13.5-14.4 Surface Laptop 6/5/Studio 2, Surface Book 3, 360 Protective Case Fit Asus VivoBook : Electronics