It looks like birds are eating the bugs off your fruits so its hard to nail it down.

I think you could scrub those bugs off with soapy water and a kitchen scrubber or try placing alcohol on a swab and rubbing each one.

Finally starting washing the plant with compost tea to keep eggs off. Check air circulation and add organic matter all around the tree.

I had an orange tree that was right next to the house so the air circulation was poor. The soil around it was covered with concrete and it got hit by every pest as a result.

I started mulching the parking strip garden all around it with grass clippings and washing it. Planted some nasturtiums under it and one day it got well it was impervious to pest.

The medicine in that orange tree was so strong sick people claimed that eating the fruit healed ailments. Good luck.

damage appears to be more mechanical than from critters.

Any sand storms or just extra windy days? Or power sprays/sandblasting?