I have never grown okra, so I was hoping someone else would respond.
Since that didn't happen, I'll give my opinion that it doesn't look like fungus. My guess would be a major pest attack. The large holes look like slug damage. All the rest looks like scarring left behind by some kind of sucking insect.
The slugs only come out at night. To check come out well after dark with a flashlight and look for them, checking down in leaf crotches or undersides of leaves.
Sucking pests could be aphids, thrips, or spider mites (especially if you find any little bits of webbing on the undersides of leaves).