For the seek bar we are also working on having the track on the notification use the chapter track setting if you have that enabled. I'm not sure if you are aware of that setting but you can enable use chapter track which will convert the progress bar to be for each chapter instead of the entire audiobook. The notification doesn't respect that setting yet though, you can track that issue here: https://github.com/advplyr/audiobookshelf-app/issues/239
Agreed, Android permissions have been a nightmare to work with.