Blondie's chart seems to indicate steady growth through the years, though slowing after 2016 (which was before Covid). I guess this is when there was considerable sell off of poorly producing (of contributions) congregations.
IDK if I believe that number of congregations is that indicative of anything. All reports on attendance are that it is on a serious downtrend. ZOOM attendance is questionable as any kind of "attendance". I personally know some who admit they sign on, but without camera, and thus are able to go about with whatever task they really want to be doing -- watching TV, whatever, etc
Clearly there is no zeal or urgency. The JWs I know personally and via reports from JW family are all vacationing big time. Nearly everyone has made at least one international vacation and very often they are to Europe. (That's probably a bigger deal for US citizens than others. Traveling to an international destination other than ie, Cancun is fairly expensive and a 10 hour flight.) You wouldn't know they are worried about the cost of milk and eggs.