Note that the entire frame rate selection is different between the two standards, PAL tending to be 25 (and multiples) and NTSC being just under 30 (29.97) (and multiples). This continues into 100 and 120-minus on the R5.
Depending on what you plan to do with your videos, it probably doesn't *really* matter which one you use, but Canon seems to be setting the "default" for a camera to match where it is sold, so my R5 (and probably my RP, though I haven't looked) was set to NTSC out of the box. Unfortunately this can make discussion a bit confusing as some people on a cosmopolitian forum like this will have 25 fps while others will have 29.97 fps available.
FWIW, you can use both 24 and 30fps with 50Hz lights, just make sure your shutter is set to a multiple of 1/50s. That isn't a proper 180° shutter angle, but it's good enough for filming my kids