Why iphones hot spot speed is so slow?

My iPhone gives 200mbps speed when tested with Speed test. At same time devices connected to same iphones hot spot only get about 20Mbps. Is there some technical or Apples made limitation or why is it so?

And no, I dont have no apps using bandwith background, and I already tested the speed with speedtest in phone and got the 200mbps with the same environment. I have booted my iphone and also put it to plane mode and back which clears dataconnections even more effectively than reboot of phone, to make sure it is workin properly. And i use wifi, not bluetooth connections. And I have not many devices using my hot spot during test. And my service provider gives me actual 200Mbp speed as Speedtest shows.