Hey there!
Nice to meet you! I'm Randy, an Independent Advisor.
Hi, If your TCL TV and Windows 11 PC detect each other but fail to pair after the PIN step, try these fixes: first, remove the TV from Settings > Bluetooth & devices, restart both devices, and re-pair, second, update your Bluetooth driver via Device Manager or your PC maker’s website; third, ensure the TV is in the correct Bluetooth mode (e.g, "Bluetooth Speaker" for audio) and, if possible, try pairing with a simple code like 0000 or 1234 instead of the auto-generated PIN.
Best regards,