SW metering data is not related to either HW or SW inv.
SW inventory should be turn off or turn down to every 21 days.
HW inventory should be set to daily.
If you are NOT see HW last date, then it likely means that your inventory is not working correctly.
Here is how to check your HW inventory. https://www.recastsoftware.com/resources/updated-troubleshoot-configmgr-hardware-inventory-issues/