As I understand it, Auracast allows for multiple transmissions to be available in any location, just as you can have multiple WiFi hotspots. These can be open or password protected to restrict access to certain users. You must have some way of picking which one you want to connect to, and also to enter a password if necessary.
This means that you must have a device that can see Auracast broadcasts paired with your listening devices (eg, hearing aids, headphones, etc.) and that can host software to select which Auracast broadcast to connect them with.
I generally have found that while many newer Windows PCs have excellent Bluetooth capabilities, Windows itself provides very little ability to manage Bluetooth, so I’d guess that you will need to have a phone paired with your aids to handle the selection process before the aids can connect with the PC through any broadcast device.
I have just started another topic (Samsung Galaxy S25 and Auracast) describing how my new Samsung Galaxy S25 Ultra phone supports Auracast. I already had a Homespot Auracast transmitter and headphone set on order, and after reading this thread, have also ordered a Floogoo FMA120 to play with. When I get them and have had some time to try them with the phone and my Jabra EP20 aids, I will share what I learn here.