Referencing this report: https://www.lansweeper.com/report/bios-version-audit/
While the report does seem to work, it is not correctly reporting the latest release - particularly I'm seeing this on some Lenovo devices. Perhaps an alternate report could be posted with instructions on creating your own report with current bios versions if the sources for this one are not updated. Here's some examples from my environment:
Lenovo ThinkCentre M720s - Reported latest Version M1UKT50A with release date 02/17/2020. Actual: M1UKT52A (04/07/20)
Lenovo ThinkCentre M920Z - Reported latest Version M1MKT40A with release date 07/10/19. Actual: M1MKT43A (01/09/20)
There are a few others, but hopefully this is enough information to look into it.