I have a cat that has been an overeater since birth. His siblings would nurse until they were full and then back off to take a little cat nap, but he would nurse until mom left the box the kittens were in and he couldn’t get to her anymore. I feed each of my cats on a schedule and each has a separate place to eat so they can’t steal from each other. Left over food from the other cats gets picked up before the overeater is let out. There are a lot of complicated slow feeders on the market, but a cheap and simple one has worked great for me. It is a narrow, deep bowl with a wide lip that he can only pull a few pieces of food out of at a time with his paw. Wet food hasn’t been as much of a problem with vomiting, so I haven’t tried any slow feeders meant for wet food. Mine eat wet food in the morning and dry food in the evening.

I am linking the feeder I own, I haven’t seen one by any other brands but the design is so simple that they might exist if this one isn’t available near you or you may even be able to craft a DIY version. https://catit.us/products/catit-multi-feeder