Why are contacts not synced with the application in telegramm?

Question

Data synchronization

Contacts more than 1000,
Maybe this is the problem?
The ultimate goal is to add them to the telegram channel

Answer 1

I have an android phone, 10800 contacts. The goal is to add everyone who has a telegram to their channel. So the question is how to synchronize? out of such a number of contacts, the telegram shows only 11 people in contacts.