Simply put, you are not properly warming up your account when you first create it or you are posting too much in the beginning.
1st, you need to engage and scroll on FYP when you make your account. Look up content in your niche and watch/like/save/follow. Just do it for a bit until your FYP is full with the content you want to post.
2nd, post once a day for 1 week. If you’re a new account spitting out 3-5 posts a day no wonder you will get no views, you are gaining a trust score on your account in week 1.
It’s never tik toks issue.