Hi there,
This is Wil, one of the independent advisor, an expert with Windows 10 and a fellow Windows 10 user like you. I understand your concern about Microsoft Teams.
Though there are really Microsoft services that are not available in Iran, you may still try to install and use Microsoft teams by downloading the desktop version on this link https://www.microsoft.com/en-us/microsoft-365/m... or use the web-based version on this link https://teams.microsoft.com/go#
I hope the information I provided will help you. If you need further assistance please do reply back and I will respond as quickly as possible. Have a nice day.
Thanks,
Wilfred P.
Independent Advisor