Perhaps what the OP means is the Telegram wallet @wallet this wallet has indeed connected the integration of fiat money deposits depending on your own country, my region The Telegram supports fiat.
I have not used this wallet for a long time, because it is not so convenient or not a habit, but external wallets that are often used more easily can also be out of habit.
Telegram remains only in use for chatting no more than that although some get notifications of attractive offers from this wallet.
What exactly looks like? Because I have @wallet on my Telegram, but there's no option to use fiat or deposit via fiat. Maybe, like you said, it depends on where I live.
I tried to check even the apps tab but I couldn't see anything related to fiat-to-crypto exchange or similar.
However, I do see the help faqs from
https://help.wallet.tg/article/5-p2p-market-faqIt looks like a P2P platform that supports fiat-to-crypto.
I dig for more information, but I end up finding that my country supports P2P, but I can't seem to find it anywhere from the wallet.
Have you tried to check that right now if it still exists or was being removed? Maybe it existed before, but right now I can't find this p2p from the Telegram app.