You can't send USDT directly from the SUI wallet to Binance. You can bridge your USDT to Ethereum, and then deposit it on Binance. The bridge to use for transferring is https://portalbridge.com/?sourceChain=sui. If you are unsure about any step, try a small amount first to avoid loss.

Now the easiest way that you need to swap that USDT to USDC then transfer to binance

You can't transfer USDT to another chain from SUI directly without using a bridge.