My tiktok algorithm doesnt work

Ive been having an issue with this for 2 years now, its that whatever i like, comment on, save or repost, i still dont get the videos id want, i even spend hours searching for topics or types of videos so my fyp changes, but it just doesnt, idk what to do, im frustrated, everywhere else it works perfectly (youtube shorts and reels for example) please if anyone knows how to fix this then let me know 😔🙏