How can I access the FW on the aids to even know what version it is, let alone to update it?
If you have the Oticon ON app installed to can check your firmware rev. Go into the information page and tap on the picture of the hearing aids. That will bring up the firmware revision number and hearing aid serial numbers.
Here is an old picture from before I updated the firmware. Mine now show 6.0 Software.

You’re ignoring this member’s posts.