The plants don't look terrible, you should be able to turn them around easily. The first show red and yellow, so it's not getting the nutrients, which is almost always due to PH, follow my instructions, it will work! You can get Ammonium sulfate almost at any independent nursery, Amazon, or look at grass fertilizer ratio is 21 0 0. Some are just pure ammonium sulfate, look at ingredients.Also to add P-K and micros nutrients use Holly-Tone or Cottonseed meal or any acid loving fertilizer. Only use acid loving fertilizer as it is low in nitrates, Blueberries do like Urea, or ammonium based nitrogen. The Ammonium sulfate will lower PH so the plant can utilize the nutrients. Feeding them without doing this will not help at all.
Another amendment to consider is Iron, iron sulfate may help the situation too.

Hope you are right. I have 9 southern highbush and 2 pink lemonade that I think are closer related to rabbiteye. If next spring they do not produce fruit lack of pollination could be one of the problems. I guess I will wait and see.

The point I was trying to make was 2 plants of the same variety doesn't help in pollination.

I also misread the plants were in the ground for a year. I thought they were in the ground for 2 years. They don't look bad for 1 year old plants. I would take a soil test to see what the pH is before digging them up. If between 4.5 and 5.5 pH would not be a problem.

Also VERY IMPORTANT

We are entering dormant season so I would not use it till spring. To bring the PH down for now use vinegar in tap water. use your meter to get water to about 5.0.
We want blueberries around 4.8 to.5.5.
Vinegar is only temporary but it is not a fertilizer, so OK to use if plants are dormant. I use sulfuric acid in water and bring it down to 5.0. I use battery acid you can get at any auto parts store. it is very safe to use. Acid must be pure or it could damage battery, even make it explode. Rumors of lead in the acid are not true, the lead is in the battery, don't use the acid out of a battery!
Be careful handling. Sulfuric acid turns carbonates to gypsum. So removes them for good. Vinegar converts them
to calcium acetate. Calcium acetate can be broken back down to carbonates by bacteria in about a month. So this is a temporary lowering of the PH. In pots calcium acetate: can be washed out and so vinegar works better and does work longer.

Sulfur added to the soil is converted to sulfuric acid by bacteria. it takes 6 months to a year. Once stable use sulfur to maintain a proper PH.

If you wish to stay organic you do not have to use the ammonium sulfate. You can use vinegar or sulfuric acid to stabilize PH, and use an acid loving organic fertilizer in the spring. Like Holly-Tone, or cottonseed meal, or Dr Earth for acid plants.
Again once PH is where we want it, I use sulfur. It's cheap. I monitor levels and such. I can adjust using battery acid. If too low, straight tap water will raise it. If PH drops below 4.0 you need to raise it.

Hope I didn't confuse you. Lot's of info to absorb!
My bluberries are turning red due to the cold, and will drop all leaves. Here is a photo of one in full fall color.

Here it is in the middle of last summer

Ripe berries from the same plant

If blueberries flower at the same time they will cross fertilize regardless of "species." Whether there are pollinators available to visit the bell flowers can also be a problem.

Some of that can be the season ending "fall colors" of dormancy on the second pick, down low and working up. Could be salt damage or under watering on the first image, but not too bad. But frankly I doubt you can grow blueberries in the ground in Fresno in the long run no matter what you do. I know some areas have great topsoil but others are alkaline soil aren't they? Half wine/bourbon barrels. Hopefully the chill hours in your area will support fruiting of those cultivars?

Good luck with the pH meter. I have never had one yet that worked.