There might be instances where after the initial tenant scan, that changes were made to only a select number of libraries. Rather than rescan the entire tenant, you can select the specific drives to scan.
NOTE:More significant changes, such as the addition of a new team and consequently the creation of a new drive, requires a tenant scan for the drive to be scanned.
Select Microsoft 365 > Drives.
Select the check boxes associated with the listed drives you want to scan, then click Scan.