No. (As of now.)
“is about to get”
“will start rolling out to Fairphone 5 users shortly”
Edit a few hours later: With shortly they really meant shortly, it’s being rolled out now, apparently.
No, in the meantime it does support this for selected devices and selected upgrade steps, which will need to be prepared by the developers with a lot of work and testing (like with any stock Android OS in this regard).
You can follow proceedings in the weekly posts in Topics tagged development-updates, section “OS OTA Related information” currently.
Correct.
There is no answer to find yet …