System drivers are showing up-to-date. But if i go to "find other drivers for my system" , there are some 'critical' ?

Re:  What am I missing here?

If you are using Dell SA or Dell Update, they are not always reliable.  Instead, just run Windows update and you should be good.  The drivers should be updated automatically by Windows.

You may perform system update once a month at any day after the second Tuesday (Microsoft monthly update releases).  From Windows Update screen, select Advanced options =>  Optional updates, then select all drivers if any for update.  That should keep your system drivers up to date (except for BIOS firmware, avoid update unless your system having issue).

To determine if your system drivers need to be update, you can run Device Manager and then comparing certain driver version to the driver version from Dell website for verification before performing manual update.