Hey everyone, been playing this game recently. Been looking for a guide online of the locations of the giant Bonus rings that take you to the special stage to try to earn Chaos Emeralds, and I can only find text guides for the early levels in the game. Any help would be greatly appreciated.

This is probably unhelpful, since I've not played Sonic Mania in so long. I think I waited until after I'd finished the game first, which opens up a sort of "level select" option in your save file. All of your progress maintains, including Chaos Emerald discovery, so I just kept running Green Hill Zone, a stage on which I could access the Bonus Ring easily, and earned all the Emeralds that way.