Haikyu filmed everything?

I have been wondering since season 3 on Netflix (it took 2 days because I was so fascinated by the series no flex or something) whether everything will be filmed as a series of course. So I thought if everything should be filmed how long would it take?

Not all episodes of Haikyu on Netflix? Does that go any further?

Yes there's still season 4 (which has already been made into a film) but there are still countless mangas and in the end there should be the decisive fight between Kageyma and hinata (hope the names were spelled correctly)

Years

10 episodes in 2 days would not be intended for flexing anyway, that is normal so I watch e.g. More than 10 episodes in one day

Where are the 10 following?

there are 3 seasons with 2 each which have 25 to follow and take about 20-30min the last has 15 but it took me 4 days

Officially there's no information, but I think Haikyu is popular enough to be fully adapted.

Haikyu currently has 398 chapters (Manga is still running but is in the final arc). By the first half of the fourth season, 249 chapters had been adapted. The second half will probably go to Chapter 290/291, i.e. The end of Karasuno vs. Inarizaki.

Then there are over 100 chapters left. A minimum of two seasons would still be possible. So I would expect 2 - 3 years for the end of the anime.