Yes, it will give you seed phrase which contain 24 words. But have you tested it before to know if it is BIP39 seed phrase or not? If you test it, you will see that it is not BIP39 seed phrase.
If you want a Ton wallet, Telegram wallet is the worst that I have seen because many people will think they have BIP39 seed phrase but it is not BIP39.
I've never checked whether it's BIP39 or not. I'm not active on Telegram Wallet, but I use it when I'm working on Notcoin and Dogs tasks.
I would not use this wallet as there have been many complaints about funds being blocked. When blocked, KYC will be required, and even this does not guarantee the funds will be unfrozen. This is a custodial wallet. If you want to have a wallet inside Telegram, then there are a lot of verified non-custodial bot wallets, including those from well-known crypto exchanges.
They also provide an exchange with P2P, so it's normal for them to require KYC. As long as you're not suspected of account farming, your account won't be blocked. If you're blocked, and you can provide valid proof, it should be unblocked. I once had tokens that couldn't be withdrawn because I mistakenly entered the built-in address instead of the TON space. The process so far is good, and I received the tokens I requested after following their procedure. However, I agree that it's better not to use the built-in wallet if you don't want to do KYC.