Yoda should be in it.

I could see Yoda making some sort of cameo appearance

Jabba I doubt it

Maybe Yoda, but not Jabba imo.

High Republic according to the information provided have three Grandmasters one of them is Yoda.

^One of them, Pra-tre Veter, is already dead by the time of The Acolyte.

The HighRepublic is touted as the golden age of Jedi they were very strong here, and very open to many things.

I hope to see many seasons of Acolyte because is fascinating to see such a era where the Jedi were so strong.

Though this is near the end of the High Republic segment of the Ruusan Republic.

I would be surprised if we don't see Yoda, but not the council. That being said, I wouldn't be surprised if we saw the council as a whole anyway (which would mean likely seeing Oppo Rancisis, Yarael Poof, and maybe Yaddle since it seems she left the council at some point between Phases 1 and 2 of THR, but rejoined it at some point between Phase 3 and The Phantom Menace). Depending on how long Anx live (or how the remainder of Phase 3 turns out), we may see Xo Lahru as well; I expect the rest of the council beyond Yoda, Oppo, Yarael, and possibly Yaddle and Xo would be entirely new characters, though, unless we see more prequel councilmembers alive during THR.

They mentioned Yoda during this time to be stronger than what people are used to.