I don’t know why everyone is so stuck on batteries. I’ve replaced dozens over the years with both OEM and third parties, with a wide range of experience from the negative to the positive.Apple replaced the battery in one of my iPhone SE1s a few years ago
Worst battery I've ever had -- charge life was awful and it ended up swelling and I replaced it myself the 2nd time with one from Amazon with great reviews -- it's still in there and doing great.
I'm not sure what Apple is "protecting" with "official parts", but I suspect it's "profit" they are protecting above anything else.
Unless something has changed in recent years (and they may have), batteries have been the one component that has never had a block of any type in place?
Do I have that wrong?