

This. The QMK environment flashing tools are generic and bundled for convenience, so they will work fine even with firmware files that aren’t QMK at all, so long as they’re for your keyboard or chipset. I use them to flash Soarer’s style firmwares on Tuxedo OS.















I’m not sure if it’s close enough to work without mucking about, but I understand the Keychron Launcher is just a fork of VIA, which has an Electron app that basically containerizes the web app and makes it easier to have the right permissions.
I’d also suggest that if you’re not looking for any new features or having any issues or just an incorrigible tinkerer (guilty of this one myself), just leave the firmware be. As mentioned elsewhere though, if it’s QMK, the Linux QMK environment should have all the commands you need to flash the board.