I've been using UCCNC for my Stepcraft D600 for years, with Fusino360, Vectric VCarve (& various other Vectric products), and Inkscape with some plugins for laser.
I'm now looking at trying to get some native CAM from Blender, and their BlenderCAM plugin (recently changed names to FabEx) has several different machine post-processor options. I don't see UCCNC in there.
Going down some rabbit trails elsewhere, it looked like LinuxCNC might have been compatible.
They have:
Iso, Mach3, LinuxCNC-EMC2, Fadal, grbl, Heidenhain, Heidenhain530, Heidenhain TNC151, Sieg KX1, Hafco HM-50, Centroid M40, Anilam Crusader M, Gravos, WinMC-NC, ShopBot MTC, Lunux Otter o
Would one of those work?
The main maintainer of that blender plugin on github is pppalain - if relevant. I'm not sure if I can post links with a new account on here.
Thanks!