For the flying egg group page, it says
All Pokémon in this group are part Flying type, except for Decidueye
Since generation 8, that has been changed. Now, Galarian Sirfetch'd, Hisuian Decidueye, the Quaxly line, Flittle, and Espathra are all in the flying egg group yet not flying types.
I think this should be updated or just deleted.
Also, Maushold's "Moves Learned" section only has egg moves. It says it does not learn any level up or TM moves, but other sites, like Bulbapedia say otherwise. It needs to be updated with all of Maushold's actual moves.
The breeding page should be updated. It currently says:
Pokémon are compatible for breeding if:
They are not legendary Pokémon, baby Pokémon, Unown, Nidorina or Nidoqueen
Now, the Galar fossils and Paradox Pokemon are undiscovered, so they cannot be bred either. I think it should just be updated to:
Pokémon are compatible for breeding if:
They are not in the undiscovered group (at the right).