Rebirth 1 Switch is the Steam PC version ported over with all DLC. That means no RED or 5PB. It runs just fine on Nintendo Switch 2 and seems to target 60fps. The optional late Rebeat Resort and Ario Plateau imported from mk2 and Victory had a more noticeable load time and the frame rate started dipping. I saw a review saying Switch 1 runs it worse but I'm not pulling mine out of storage to check.

They did mess up one thing and that was the copyright notification baked into system screenshots.