In my case, Linux, few things have to be aligned.
- Ensure that HAs aren’t connected to the phone
- Connect with laptop bt
- Switch laptop output to headphone/headset even if they’re unplugged, since it is not doing it automatically from speakers
- Choose HAs as output device
Step 3 was crucial
I think now it does step 4 automatically
But step 3 I definitely have to check
Maybe your desktop is similarly finicky