not sure why they would want to warn Autodesk. Fusion gives you multiple formats to save your 3D print projects in… and 3mf works in all the others slicers with no issues.
If Bambu wanted to impress with the 2.0 version. Maybe they should have added a conversion for STL, OBJ, or 3MF to STEP. There are tones of things in Maker that are great but need a tweak or two to work for your specific situation.