Ant-Man 3 isn't official yet, but I can't imagine they went to the trouble of recasting Cassie just for that bit part in Endgame. I could see them leaning more toward Stature than Stinger for the movies, and I wouldn't be surprised to see the comics following suit.

(We did sort of get a tease of that in Wasp #7. Of course that was to contrast Cassie with Nadia.)