Hi
It doesn’t look like any sort of deficiency im aware of so thoughs would be some sort of bug/insect
I would just remove the leaf and keep an eye on it, plant looks nice and healthy so should be fine 👍
Best of luck 🌱
Get yourself some BT (bacilius thuriengiensis) from any garden center or Amazon... it will make the leaf eaters decide to get their lunch elsewhere (so they'll take off and die elsewhere, too!).... It's organic... always handy to have on hand for whatever is munching on your leaves...
Good luck!