So you’re looking for GUI configuration, like Via (keyboard.frame.work), not firmware uploading, correct?
The Via protocol will be available. Via used to be closed source, but they finally opened it up some time ago. And the protocol, or enough of it, would have had to be available anyway for it to talk to the open source QMK.
But if you’re looking to go as far as talking to the keyboards over the Via protocol and creating a GUI, I’d suggest just converting your keyboards to Vial/QMK instead of Via/QMK.
Vial offers desktop apps for Windows, Linux, and Mac, in addition to a web option at https://vial.rocks. The desktop apps work fully offline, unlike Via’s electron app. And Vial also has more features than Via. Tapdance, combos, key overrides, and a range of qmk settings. Much better than Via, imo. A community member made a Vial port here, Keyboard: VIA / VIAL support? . Currently, it has the macropad and ANSI keyboards, it wouldn’t be hard to add others. Files that you can just flash over, right away, are here, github.com/spdkils/Framework-macropad/releases.