I had purchased both my Windows 10 computer and my TCL 65S425 in 2019. The screen mirroring had worked before, but now I was having trouble. Yes, as others said, it connects to my Android phone without a problem, so I figured it was something with Windows. I went to Intel and updated a few drivers, one of which was a Bluetooth driver and also a Wireless Adapter driver. Use this link, it'll scan your system and recommend drivers to update. It's the Intel website so I trusted it, don't seem to have any issues. Anyway, my computer finds it now and connects!