Someone on YT had a good idea for slowing down eating. She got an ice cube holder with small ice cube holes and put a few kibble in each hole, and the dog has to get the kibble out of each hole....and that takes time. I'm glad the Slobowl works for some, I have had no luck with it for my dog.
He tends to push the kibble out onto the floor too and then eat from the floor

Ah well, LOL!