I'm assuming you are creating or editing a Fusion 360 post?
Neither of these lines actually do anything.G53 Z0
G54 Z0
Do you mean G0 G53 Z0?
Personally, I remove that from my post. I don't want the machine to rapid all the way up at the start of my code.
I also wouldn't want a G0 G54 Z0, as that could cause a crash.
Also, G94, G91.1, G21, and G20 are not used in UCCNC. (Hopefully G94 will in the future, if the often requested G93 is added.)