I am trying to catch any issues I have with my vegetable plants early on this year.

You weren't by chance putting pellets of fertilizer on these plants were you? (even if you didn't see any get on the leaves) they look extremely well fertilized, super dark green.

Other guesses are a wilt virus or sunscald.

I have not fertilized them yet. If it one of the things you mentioned what should I do?

They look like mechanical damage to me, it probably happened early on while the leaves were still growing.
It's usually caused by stink bugs and other insects attacking buds and young leaves but whatever it was it's now gone.
However...

Unless you are growing a variety that is known to be resistant to angular leaf spot (ALS) such as Eureka, keep an eye if you see more lesions like the tiny one towards the center of the leaf in picture #2. If you see more appearing, ALS has arrived. It can be managed by using a copper-based fingicide every fortnight and by using a low-nitrogen fertilizer during growth season. Dry weather also helps a lot but we haven't got control over that.
Yet.

I would agree with spraying them with fungicide regularly and otherwise just seeing how they do.

Thank you so much for your help. I really appreciate your insight. I'm going to try the copper spray soon. Hopefully I won't have any more issues.