I just wanted to enquire just as how the descendants the prophet and Imams are syeds, there are pashtun clans who’ve migrated from Afghanistan to Pakistan named Yusufzai and hashimkhel who are the descendants of prophet Yusuf. Does this make them Syeds as well?

Sayeds need to have a family tree to prove that they are sayed. Without a family tree it’s difficult to prove.

Most likely those people are not descendants of prophet Yusuf. If they are they need to have a family tree to prove it. They are not Sayeds either.