Paramount+ may already be doing it (??)
MrGrackle
The current Chrome version is 141.0.7390.108 (Official Build)
and still includes WidevineCdm 4.10.2891.0
The
WidevineCdm update to 4.10.2934.0 is performed with Chrome 142 (current beta)
So if P+ were to require this, no TV with a current
browser would be able to receive titles in FHD !
So that's impossible at the moment, and the 540p limitation is already 10 weeks old ..
.. apart from that, I still get 1080p with SF in several countries - see also
here