Disclose your stutter first, even a stutterphobe will feel some guilt in laughing at you if you do this. Always have a backup plan, it can be anything from working at the grocery store to a job offer from FAANG, having this will drastically reduce your stutter because your mind knows you have something to fall back to in the event of failure. If you have to do leetcode problems than make sure you can do the ones the company asks. If you have a female interviewer make sure you are well lit. If you have multiple rounds of interviews in a day try to split them into two days.