It's a success by the US comic book market, for sure. But it won't be able to sell similar numbers to what Demon Slayer did.
If Invincible sells more than a million copies, it would be incredible compared to the comic book standards and still would have to sell 90 millions more to get close to the numbers DS had in 2020 in Japan.
https://comicbook.com/anime/news/dem...sales-in-2020/