i found one on fdroid but it was old and the directory selector was broken and couldn’t really work outside of it’s default for some reason, it also rendered the page i’m trying to use really weirdly, like it wasn’t sending some file over and the css got borked.
Found one that wasn’t foss, installed it, opened it, “buy premium to unlock this feature”, uninstalled it.
Just did a search on fdroid
Servdroid looks 11 years old
LWS is about 5 which might still work
If you really need a web server you can possibly run one on termux, not sure if root required though
If its just file sharing, see the other comment