If you want to swap, i can advice exch : https://exch.cx/

Actually, there is far more liquidity on usdc rather than usdt but it change in the time.

There is no KYC and I never had any issue with the service
 https://image.nostr.build/73d276dcc4551f9f6cd9c58143b7b396d3f33e0c1aaded0a4ffd6fe1a4293871.jpg 

 I see they accept btc on lightning for swap. That's cool