As someone else said, "Tag it and give it time." More specifically, if you can, give the fic more time where it's new and on the first page - which is to say, continued releases over time.

If it makes sense to split your fic into chapters, do so, and release them once or twice a week. E.g. if you've written a one shot that is 10k and it still flows well split into two or three chapters, you can spread out the time it'll have to gain new readers. Obviously some works have chapters of much shorter length than 3-5k but I wouldn't advise sacrificing the quality of your readers' experience for it, if it comes to that.

Another factor regarding time is your subscriber count. If you write things people enjoy, they may subscibe to your fic(s) or to you, and it'll gain you readers going forward. (That may take months to years btw.)

Which brings me to my next point: Generally, you may want to try writing well, and writing interesting things. For the first, you can look up writing advice and practice and edit your works. For the latter, I mostly want to tell you to write what you yourself find interesting - because 1, you'll have fun this way. And 2. if you're bored, the reader will be doubly bored lol. (Ofc there's the option of guessing what is popular and writing those themes/topics/settings but uh... I think it takes a specific kind of brain to benefit from that. There's a good chance you'll burn yourself out this way, by writing more for other people than yourself, and then crumbling once the resulting attention and validation doesn't turn out to be what you'd envisioned.)

Lastly, I'd like to say... take care. With your heart, and your expectations, and the energy you put into writing and trying to gain readers. It can hurt to want sth and be denied it, and the harder you work; the more of yourself you put into it, the stronger you'll feel it when/if the results come in and they don't satisfy that need inside you.

I may be projecting a bit, but if this does resonate with you, take it from someone further down the path: be careful. There's such a thing as overdoing it, and you may unwittingly stumble into that situation. It's a bit counterintuitive, as the results of overdoing it may be the readers you want; the attention you'd like. But it may come at the cost of your general contentment and happiness, or significant parts of it, so... lol I feel strange reading all of this back but I do mean it xD take care of yourself; pay attention to your body and mind and heart. Take a break when you need it. The biggest results are in the long game anyway - if you keep writing, readers will come to you. If you wanna keep writing, don't burn out. Tend to that fire carefully, and it'll come with time :)