I finally made a new image (20220129-UNOFFICIAL) with the January 2022 security patch level.
Full list of local mods with respect to upstream Lineage-16.0 tree (practically unchanged since December):
Modified gps.conf which (for me) enables the Pro1 to get its initial fix much faster.
Corrected QoS powerhint signals. Backport from Lineage 18.1.
Keyboard driver: Enable high keycodes Backport from Lineage 18.1.
Keyboard driver: Fn-Tab acts as Alt-Tab. Cherry-picked from an experimental patch proposed by @Slion against LOS 18.1. Was never merged into any official dist
@kashif, my original screen of Pro1 did not have similar dots but practically every replacement screens (mostly spare) bought at Aliexpress had a similar problem at corners at a higher or lower rate.
However, it has not changes for me, I don't think you have to worry about it.
I've had one such dot since day one. It has not worsened one bit in 1.5 years. It seems to be a quite common QA problem with this kind of screen, not limited to the Pro1. I wouldn't worry too much about it.