A better metric is workforce participation rate which is at an all time low
This is the opposite of true - it's not at a historic high, either, but it's climbing. And, it's notable that it blipped back up to as if Covid hadn't happened, which most countries haven't been able to do. (Also worth noting that all this is taking place within a tiny range of 4% on the full size graph; even the "big" Covid dip was only a drop of 3%.)
Unemployment as it's defined on the charts is actually sort of a bad metric, yes. For whatever reason the story picked a bunch of not really all that good metrics (economic expansion, stock market) and then asked people about them. I do think it would have been a much better story if they'd asked about wages instead of these corporate-friendly metrics.