Which Pac-Man games are canon? And if there are any... Where would you put them on a Pac-Man Timeline?

Different timelines. Probably classic, world , and ghostly adventures as the main three. The canon of classic games in relation to the other two is debatable.

All of them are canon, but not all exist in the same timeline. The original arcade Pac-Man exists as the beginning of all timelines. Level 256 is the rupture that created infinite alternate Pac-timelines in which all other Pac-Man games exist.

I Hope These posts must be relevant to Pac-Man

I think the first two Pac-Man World games are canon considering they were developed by Namco.