Economic inactivity (out of work and not looking for work) sits at 21% Vs the 21.6% of 2016.
The big shift is the youth unemployment (higher) and I presume that as the figures are broadly stable despite that, people retiring at a later age? The number of vacancies is much lower now, too.
I think this is what is ignored in the narrative. Even if every feckless wanderer took the first job available, there wouldn't be enough jobs for everyone to work. There would always be unemployment. Unless, of course, people worked less hours so the jobs could be split, but then people would moan that those people needed support because they weren't earning enough, when they could work full time.