These board markings don’t really mean much to us I’m afraid. Nintendo switched to the patched type mid way through the CPU 10 board rev, the best it can tell you is, there is a higher chance of it being unpatched if it’s a CPU - 10 board but there is a good amount of patched CPU 10 boards which are also patched… the inverse is true also, there are a few unpatched CPU 20 boards but the probability is the vast majority are patched.
The only thing (from memory) that these marking definatively tell you is which region the switch was sold in, the chinese and austrailian boards have a different marking (if I’m remembering right)
This was a cost cutting excercise mid way through, same as earlier, the vast majority of CPU-10 boards have the diodes and a small fraction don’t, CPU-20 boards - a small fraction has them, the vast majority don’t