I will leave this here: https://www.reddit.com/r/badeconomics/comments/jd3p0l/axios_...
to show why LISEP's measure of unemployment is problematic. I haven't had chance to look at the methodology for this particular piece but I suspect it's also got few holes/unmentioned bias in there (as so many of these think-tanks do).
BLS also has different measures of unemployment (see: https://www.bls.gov/news.release/empsit.t15.htm) and what LISEP is citing as "headline unemployment" is U3. Not all metrics are perfect and I think it's important to understand the methodology and the nuances of how to apply these different metrics.