But my cat is fed twice a day...
There is probably a better way involving home assistant and a smart plug, but I’m a sucker for those TP link Kasa plugs and default to them for every problem.
Make it so that it has four food tanks, which it cycles through. This way, so you can provide some variety for the cat.
Have the four food tanks arranged so that two are on the left side, one above the other. Similar for the right side.
The 0 hour feeding comes from the bottom left tank, the 6 hour feeding from top left, the 12 hours from bottom right, and the 18 hour from top right.
Associated with each top tank is a lever or dial with two settings: feed or skip.
The outputs from the top tanks go to a forked chute, with the level controlling which fork is taken. The "feed" fork leads to the bowl for the cat. The "skip" fork leads to the bottom tank on that side.