an auto feeder will not work with wet food
Yes, you can use the auto feeder with wet food. Depending on the auto feeder, you can put ice packs under the compartment with the food. If no space for ice packs, you can make "frozen hockey pucks", small portions of the wet food that would fit in the compartments.
maybe replacing his mini-meal with a few purebite treats
Instead of replacing the mini-meal with a few Purebite treats, try the wet food in the auto feeder for a few days instead. Wet food won't go bad that quickly. There are plenty of cats that graze, and come back for hours before they have finished off their wet food.
As you can see on the spreadsheet his PMPS is pretty high. Could his mini-meal be contributing to this high PMPS?
The pre-shot tests are the last ones to come down. It's the mid-cycle nadirs that you want to see, to know what the dose adjustments should be.
Feeding the mini-meal after the middle of the cycle, after about +6, could be part of the reason for the higher pre-shot in the evening. So see if you can shift that meal to earlier. If food is fed after the insulin is "used up" the food will simply raise the BG levels higher later in the cycle.
It could be that the insulin simply doesn't last long enough for Felix. That can happen for many reasons, only 1 of which is the food. Cats are never the same from day to day. More active one day, sleeping more another day. It makes managing feline diabetes challenging.
Some cats rise significantly in the last 30-60 minutes of the cycle. The only way to find that out, would be to try and test at that time. The +11, +11.5.
It will also be useful if you could get at least 1 more PM cycle test, every day, before you head off to sleep is a good time.
It's hard to "read between the lines" looking at the SS, but it looks to me like Felix is dropping lower in the AM cycle, before the +8 when you are able to get a test. Then, he is bouncing up from those low blues, because his body isn't used to those numbers. It would probably be ok to increase the dose to 1.25U. But please monitor that dose increase with a couple more tests. For several cycles, please.