@trainguygaming1045 is it only your Zoi not cleaning up or all the customer Zois as well?
I have the same issue in my internet café shop but here it is mainly my Zoi who would never clean his dishes up. The customers are actually bringing their plates to the bin quite frequently if not interrupted by some other action. So I only have to clean after them from time to time but my own Zoi would never clean up after eating. Also even though there is a sink and dishwasher on the property my Zoi (and also the customer Zois) are unable to wash the dishes, you can only order them to throw the plate into the bin. It seems that there is something missing in the game which would allow the Zois to recognize the dishwasher or sink as an option to wash the dishes on a business property as it is still working fine on every home lot.
I reported this issue yesterday in more detail here: Zoi is not using dishwasher or sink on his business property