Telegram is not positioned as a completely private messenger. We are talking only about encrypting correspondence when only two interlocutors have a common key. The server does not take part in the decryption process.
Any messenger will require access to this data. Telegram only guarantees security in everything related to encryption and transmission of encrypted data.
In addition, Telegram supports secret chats that use encryption from device to device, do not leave traces on servers, and are able to self-destruct after any time and which cannot be forwarded.
AIDA64 report is here: https: //drive.google.com/file/d/1--4Xj5xoDsZMTkU1pNaAiuxvwL-QQhd9/view? usp = drivesdk