Hi and welcome to the Fairphone forum,
Logs are generated but well hidden and in a different format:
You need to create a bugreport after snooping, e.g. via adb bugreport bugreport.zip, then unpack the zip file and look for the folder FS/data/misc/bluetooth/logs/. There should be some files named hci_snoop<sometimestamp>.cfa which can be opened with wireshark.
On some posts regarding the the bluetooth snooping it was recommended to first turn bluetooth off, enable snooping, enable bluetooth, do tests, disable bluetooth, disable snooping; exactly in this order. Otherwise the logs might not appear.