Where to Swap BTC for USDT

I would like to know if anyone knows a way to sell btc without being asked for KYC.

I bought BTC in 2015 I would like to start taking small profits because I will soon become a father, no idea how handle that ( we are talking 7fig +) for now just need it in USDT and decide next move, but since my BTC came from mining and forgot about it, idk where/how can I swap.