It’s often not a good idea to plant the same crop in the same
location for multiple years. Is that what has been done here? Could it be that
they have used up the best nutrients in that area or have you been feeding
them with some sort of fertilizer or other organic matter?

I do rotate each vegetable down a row or two each year. I have some organic compost and nitrogen fertilizer mixed in. It did get a little cold recently. Not below freezing, but in the thirties overnight. Could that be the issue?

Typical of plants that ran out of water, even though briefly

Hi. My plants all have this problem! Tomato eggplant and also squash. It hasn't rained much since in the ground but I've tried to keep things wer. My soul was delivered and this is the first time planting in it. Maybe it's lacking in nutrients? I did mix in some peatmoss/sphagnum and black cow manure before planting. So they need more? Pleas help!

Here are some pics!

dry tan tissue means insufficient water.
If the growing mix is evenly moist, then you must figure out why the roots have been damaged, thus aren't working up to par.