Only one Roku (2 XS) ever had Bluetooth, and it was only for its remote. Screen mirroring or casting has always been hit or miss with Windows. Usually a miss. Windows uses Miracast, which has some specific hardware requirements that you should be able to find online. But as I said, it does't always with with a Roku.
Dan Nvidia Shield, Roku Stick (3600), Ultra (4640), Premiere (3920), Insignia 720p Roku TV, Sharp 4K Roku TV, Windows 10 Pro x64 running Serviio and Plex on a wired Gigabit network.