No. The TVs in question are two years old, from 2018.
LG’s mistake here was announcing support for the 2018 models prematurely. If they had just kept their mouth shut, they could have avoided most of the bad press.
Basically it sounds like their technical group said internally they could make this work, and then their marketing group ran their collective mouth off before everything was solidly in place. Bad PR practice.
Well, my B8 was less than a year old when LG announced Airplay 2 support in the first place. But I take your point generally. Certainly if you buy a cheaper model, you would expect a shortened customer support period.
My gut feeling is that the original mention of 2018 models was a mistake, as it only appeared on a support document and wasn't an announcement as such. Certainly not like today's tweet.