The labor force participation rate was higher when Trump left office than it is now.
That is a complete lie. When trump left office it was 61.3%, and now it is 62.8%. It is noticeably higher now than when trump left office. I do not know why you think you can get away with such blatant lies.
Biden high (so far) is half a percent lower than trump's high. trump's high was 3.5% lower than Obama's high. There is a steady lowering of workforce participation as Boomers retire, but we have seen strong job growth under Biden.
https://fred.stlouisfed.org/series/CIVPART
Unemployment has long been a nearly useless number.
If there were large numbers of people who wanted a job, and could hold a job, they would be getting jobs. The problem is there are not unemployed people in the conventional sense.