Meh, I replaced the battery in a 1st gen (2016) iphone SE, per the ifixit instructions. The home pushbutton didn't work afterwards. Repeated disassembly and reassembly didn't help. No useful advice on ifixit forum. Unclear what if anything to try next. Luckily the phone was long obsolete by then, so replaced. Repairability of these things sucks and I miss swappable batteries.
The EU requirement is pretty weak and it basically says you can take the phone apart and replace the battery without iphone-like hassle levels. So when the battery reaches EOL, you can order a new battery and do the repair yourself at home. What I miss is being able to swap batteries whenever you feel like it, with no tools, like you would with a flashlight. That means you don't have to mess with power banks or worry about your phone's charge level. Just carry a spare, charged battery with you. I'm old enough to remember when basically all mobile phones were like that.
