I’ve got about a dozen tomato plants of different varieties in containers on my northeast-facing deck (mid-Atlantic region of the US), which receives about 6 hours of direct sun exposure per day. Some of them have developed these black splotches on their leaves. Based on these articles on Southern Living and Old Farmer’s Almanac, it looks like this might be a sign of Septoria leaf spot. Is that what this looks like to you all as well?
EDIT: Clarified orientation and daily sun exposure.
Sunburn would be surprising to me b/c my deck faces northeast and only gets about 6 hours of direct sunlight per day. If anything, I was afraid they would not get enough sun. But thanks anyway for chiming in!