Haz you need to cut the ends off the filter & open the paper out flat so you can see everything in the filter. Drag a magnet across it to see what sticks. It doesn't look to bad, most of what we see looks like silicone sealant. You should have the shop remove the oil sump pan to see what is there & clean the oil pickup tube screen.
Post pictures with a small object so we can reference the size of the particles.
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