Lemme take a crack at this:
1) One Piece
2) Kingdom
3) The Promised Neverland
4) Kimetsu no Yaiba
5) My Hero Academia
6) Attack on Titan
7) The Quintessential Quintuplets
8) Haikyu!!
9) One Punch Man
10) Reincarnated As A Slime/Kaguya-sama: Love Is War
I think I can see Yaiba beating out HeroAca due to strong backlogs and no new HeroAca volume till December, though honestly I think it'll be a close race. Titan will reclaim it's position as Kodansha's best-selling title after Quints briefly took it, and if it can release another volume, it could compete with HeroAca and Yaiba, so 4 through 6 are likely interchangeable. I'm thinking Kingdom backlogs will also help it propel past TPN, though again, it'll probably be close. I thought a bit about which manga would be knocked out of the Top 10, and honestly, I'm not too sure. Slime sells more, but it's monthly. Kaguya sells less, but it's weekly. I'm giving the edge to Slime because I think it had better backlog sales. Kaguya, for all of it's praise and popularity the anime garnered, lost the backlog contest to TPN and Quints.
One Piece will retain it's #1 rank either way. I'm pretty confident about that. If not, I'll binge whatever beats it.
I could've done some more research, but I'm busy preparing for school and I wanted to get in on the Top 10 predictions. This is my opinion, though, and I'm probably going to be wrong.