>>14237607It's not that uncommon for legendaries not to appear in REGIONAL dexes, which is all we've seen.
Regigigas, Darkrai, Cresselia, Shaymin, and Arceus did not appear in any, and even more have never appeared in their introductory gen's regional dex (remember the Sinnoh Dex got an update, etc).
It's also traditional for event legendaries to literally expand the dex by their introduction, adding numbers.
So fret not, OP.
There are probably more than the two legends.
We just aren't aware of them yet.
That's on purpose.