It would make sense, following the pattern set by Pokemon Legends: Arceus, and Gen 3 and Gen 8 would also be generations that the game didn't include the starters of, making up for some variety.

Plus, as a Pokemon based on a wrestler, Incineroar is one of the few fire type starters that logically should have adopted ...

Unlike other generations, the Gen 8 starter ... it's the starter I picked in Pokémon Sword and I like the symmetry of choosing the same Pokémon in Pokémon Go. I also tend to include Fire ...