Thanks for stopping by the Apple Support Communities, Cole!
I understand from your post that the USB-C ports on the right side of your MacBook Pro no longer work after using a MIDI keyboard. It looks like you've already reset the SMC and the issue is not resolved, as well. I'm happy to help!
If you have not already, I would recommend powering your Mac off, then unplugging any accessories you may still have connected to the Mac. Once you've done that, reset the SMC again: How to reset the SMC of your Mac - Apple Support. After the Mac comes back on, connect your peripherals one at a time to the affected USB-C ports to see if the issue is resolved.
If you've done that and still have trouble, see if you can reproduce the issue in safe mode: How to use safe mode on your Mac and a new, test user: How to test an issue in another user account on your Mac - Apple Support. Safe mode runs some checks on your system while booting, and resolves issues where it can. It also disables certain software and features that may cause conflicts, while a new test user will help us rule out any data or settings in your current user account that could be conflicting with the ports.
For more information and options, see if the "Solutions" section of If a Mac accessory needs more power or is using too much power - Apple Support help.
Should you still need help, don't hesitate to respond back.
Best!