proxy server

Hello. Our server is located in Iran and it can not be connected to Telegram.
Is it possible to replace the address in the “Proxy server” field?
https://api.telegram.org/bot
Entered to make the robot work properly?
Or can we buy a European host that acts as a proxy for us. And if the answer is yes, how should this be done?
In addition, due to some issues, we can not move the main server out of Iran. Thanks