Can anyone help me identify what's going on w...

if it was a pest, you'd typically see some glistening "honeydew" around the edges of the damage - their loose equivalent to spit. this looks more like physical damage like the others said. drips of ferts? too warm or dry?

I would not worry to much about it. Does not look like pests and prob from something happening when the leaf is emerging. Not all leaves will look perfect.

Are you watering buy prour it threw the leaves if so try not to with nutes in. Like @asNoriu said could be pest have a closer look would see anything tho...

Reminds mechanical damage, from too intense wind or you touching. Its still ok. Very small possibility, that you have some pests...