I always find it really funny when people complain they don't have time to cook as a streamer/content creator. That's why you do meal prep in advance and actually learn to cook. Turns out that you can cook at the same time you do other things, and when you put in the work to make 4-6 days worth of food, suddenly it's no longer that much of a burden. Arrange your life so you can cook your meal prep on a day off and it won't even overlap anything more critical that might take your attention away from cooking.
It's not being a vtuber that makes it hard, it's being too lazy to cook or simply never learning how to.