From the above forum search I found this
Does FP6 support the protocol? I found this
It would be hard to do from a distance but is there any element of /e/ which could be a blocker?
I cannot find that setting
Hearing Devices
on FP3, although it is present on a different non-/e/OS non-Fairphone. If present it would also be found from
Settings > 
Search: Audio Accessibility
Excuse the ping, perhaps you tested on your new FP6?