Sorry for your loss. Pineapple Poker seems to be new and unknown, and I have never tried a casino via Telegram, but it seems that this casino does not require KYC if I am not mistaken. How did they block your account and your friend's account and accuse you of cheating and creating multiple accounts if they do not have conclusive proof and knowledge of their customers' identities? Also, the fact that you sent the crypto to your friend’s account is actually a feature on their platform to send USDT to another player if he does not have any USDT to play, so this should not represent one of the types of collusion and cheating, as it's your money and you have the freedom to use it as you wish. Also, if they do not accept playing with friends at one table or transferring funds to them, they must mention this in the terms of use as well.
Also, through their Telegram bot, they know your IP, your friend’s IP, and your Telegram IDs. Frankly, their auditing processes don't seem transparent. It is worth noting that most of their tables contain 0 players, and I haven't found any reviews related to this Telegram casino. Therefore, it's better to avoid it, as there are more reliable alternatives available.