If the (qx-1000) Pro1 drops out of support at the official build farm, I suggest we find someone who is willing to make unofficial LOS 21.0 builds. That release seems to have worked better than 22.x anyway, and since it is from before the QPR mess, its Lineage code branch will receive ASB fixes for some years to come.
I currently do not plan to do it, as my LOS 16 is still going strong enough for me, but feel free to try to talk me into it ... 🙂