I checked and this limitation is mentioned amongst the M50 specs.
So yes, here, it hasn't been disabled.
A more complete overview on the video specs:
Internally everything is IPB codec
-4k 24p/30p is in APS-C mode (probably 1.6x)
-1080p 24p/30p can be shot in FF or APS-C mode as well, the latter is much crisper as it is downsampled (but worse rolling shutter), like on the EOS R or 1D C.
-1080p 50p/60p will be selectable only in FF mode, just like the EOS R (one cannot use EF-S lenses for 50p/60p recording)
FF 1080p quality may be the same as the 6DII or improved
Battery life will be worse than an M5(smaller sensor, same battery) and almost the same as the M50 (smaller sensor, even smaller battery).
I use an EOS M5 mostly for low res video work and have two of the LP-E17 batteries that we are told will be used in the RP, they do last very well, I’d say longer than Canon actually state.
They are very light, take up very little room in your camera bag or are easily carried around in your pocket when on location.
We know the RP isn’t a pro camera although I’m sure in the right hands and used for certain types of photography the end result could very well look like it was produced by a professional. It’s a tiny body which will appeal to a lot of people so I guess that is why Canon opted for the smaller battery.
Now I would love to see some small RF lens being announced soon, such as a fastish (F2 or even F1.8 would be nice) 24mm Pancake lens if that is possible on FF or an 85mm F1.8 (IS would be nice too) the key being to keep the weight and size minimal.
Bigger lens such as EF 24-70 F2.8 or EF 70-200 2.8 IS I’m ok with using the adaptor on these as they are not compact to start.
For 20 years I’ve shot with big cameras equipped with heavy glass but now it is possible to get great results with small and compact, so that is my preferred route or am I just getting old lol