Neobay Cat Door Latch with Stabilizer, 7 Sizes Adjustable Cat Door Holder Latch, Keeps Dog Out of Litter Box, No-Drill & Portable for Interior Doors, White, 2 Packs

We use these: https://a.co/d/04olkTmg They are primarily for keeping the dogs out of certain rooms but it also prevents the cats from locking themselves in on accident.