Thanks for the links, @Roboe, but I already knew this information. This is what I meant by “the announcement of the Permission Hub”.
I am quite surprised that there is so little information about the Permission Hub. For me, and I thought for many others, the Privacy Guard was a key feature of LineageOS.
In the end it will most likely end up for me in Edxposed with XPrivacy Lua. After all Magisk would already be installed…
Thanks @flrns for this creative approach with the profiles. However, the possibilities to restrict permissions do not go far enough for me. It is very important for me to be able to decide exactly what which APP is allowed to do and what not. (Not) sharing contacts is only one aspect of many. I am just a paranoid person. 
Now I just have to decide when I dare to switch to LineageOS 17.1…
But I am and will be still interested in information about Permission Hub and possible alternatives.
Stay healthy!
knefl