Ok a couple of things.
First you are in G94 (feed per min), lathes tend to be used in G95 (feed per rev)
Because of that your feedrate of 0.8mm is per min rather than per rev. 0.8mm per rev would actually be quite fast if in G95 but is deadly slow in G94, normally something in the range of 0.25 to 0.35mm/rev would be the norm for G95 for roughing.

Another thing is as Rich mentioned your code has U, V W, in Mach the other axes are A B C. Not that that really matters as they will be ignored.

There is G50 S2500, that is likely meant to limit the max RPM when in CSS (G96) but in Mach it is G48 that does that.

I would suggest you set your CAM to output as constant spindle rather than Constant Surface. Also edit your PP so it outputs a G95 and further that it will output a G48 rather than a G50 If indeed you do intend to stick to CSS (not recommended)

Hood

I was following a tutorial on Onecnc, and followed their settings.
I will look at the feed.

I will change it so its RPM, and edit the PP as you mention, and see how it works then.

Thanks