I look at different times throughout the day but unable to find or see anything eating the leaves.
03 September 2020 01:10 PM
Possums are the likely culprits, as they feed at night and like citrus leaves. Spray with Possum Repellent Spray, to deter them:
https://yates.com.au/product/home-pest/rodent-pest-control/yates-possum-repellent-spray/