I use this code on scrolling to fetch data works perfect on windows, for iphone i hade to add the debounceTimer and know that i have it on production android devices just fetching a few times or not fetching at all.

window.addEventListener('scroll', () => {
  if (debounceTimer) {
    clearTimeout(debounceTimer)
  }
  debounceTimer = setTimeout(() => {
    if ((window.innerHeight + window.scrollY) >= document.body.offsetHeight) {
      if (offset < rows) {
        fetchData()
      }
    }
  }, 100) 
})

Tried ai solutions but cant find anything