PAN with bluez-utils-3

Hi list!

I used to have a working private area network (pan) over bluetooth.
However, since the update to bluez-utils-3.36, it doesn't work anymore.

I especially want to get rid of the old daemons because, as I understand
it, they are deprecated. However, I just can't find satisfying
documentation on the new structure and config files.

I don't want to go into detail on what exactly doesn't work at the
moment because I really just guessed how I had to configure everything.

So my question is: Does anyone have a working set of configuration files
for newer bluez-utils? Preferably something related to the roles GN or  NAP.

Thanks in advance!
Florian Philipp