Telegram talaeii which is known also as telegram gold and hotgram are common telegram forks developed in iran.
Telegram warns against the use of these unofficial apps and google play protect (which is a features of google play store) now gives official blocking against these apps because they have proven functionality for spying.
It is good advice not to use these apps but users should be careful that the alternative apps that still are not the official telegram do not also have vulnerabilities.
The messaging app mobogram and the app wispi for voice and video are examples of the alternative apps that look like a good option because google have not warned about them but are also believed by experts to have security issues that allow for spying.
So do not change apps blindly and research to find the apps that have known vulnerabilities before use.