It all depends where the quick disconnect is hooked into the RV system. Almost all potable grills have a regulator that expects to see tank outlet pressure, which it than handles tha same as if a small bottle were hooked up.
If the QD is upstream of your RV's regulator, it's "probably" OK. If it's downstream then you have to remove the regulator on your grill. I don't know if what your RV's regulator puts out is compatible with the grill.
Murphy would probably rule that it's not!
You need to talk to someone who understands these thinge better than I do, but at least I've given you a couple of pointers!
Frank and Eileen
No longer RVers or FR owners