Trying to clean the environment and removing old datasets which have not been used or accessed for a long time.
Does SYSVIEW provide such information?
SYSVIEW 15.0 & 16.0 - z/OS supported releases -
Here are the SYSVIEW commands that can give information about these datasets:
The LISTDIR command can show update information for PDS members.
On the VTOC command, there's a RefDate field which shows when a dataset was last referenced.
That would include both updating or browsing the data set, but if it's an old date they can at least tell that it hasn't been referenced in a while.
It looks like the VTOC command is only for one VOLSER. That field is also available from DSINFO, so a DSCAT command can be run for whatever datasets then drill down to DSINFO.