I had a Nexus 7 (2013) laying around so I thought I would install LineageOS 14.1 on it. The next thing was to install F-Droid. Now the strange thing is that when I install a new app, any app actually, it doesn't require any permissions. When I click on the install button the next page will say 'Do you want to install this application? It does not require any special access.' And the app will install just fine. When I look at an app that I already installed then F-Droid happily displays what permissions it needs.