Take the bar off and start the saw. See if you’re getting any oil at all.
Try flushing the tank with mix a couple times. Make sure the drum is engaged with the oil worm gear.
If it’s still a no go- take off the clutch drum to expose the clutch. See anything weird there? The oiler is behind the clutch. Removing the clutch will get ya to the next steps (worm gear inspection, lines and plastic connections in place, the pump itself), but let’s start with the easy stuff first.