You may wish to look into NixOS or GNU Guix as taking the same ideas to the logical conclusion, or stal/ix which aspires to take a more traditional approach and in that way is perhaps closer to Gobo. All three are very much alive and actively maintained, even thriving by some metrics.

I haven’t used it in a while, but I think it just sends you an SMS with a code that you can enter manually, so yeah it works on devices without a SIM

I think you should still pass --cmd Hyprland to it, no?