I don't know about phones, but here where I live (Eastern Europe) there is no official Apple stores, but are official partners. I own 16 inch 2019 Macbook Pro which has cycle count 984 and doesn't hold much charge any more. I asked for a quote for replacement from official Apple partner and they said it would cost me 861 euros. I consider it very expensive.
The 2019 MacBook had a horrible design that makes battery replacements almost impossible. They fixed it in 2021 so it’s significantly easier to swap now.
Obviously it’s not a solution for someone who has a 2019 model. Just some context that improvement has been made here. Current MacBooks now use pull strips for adhesive.
For the others who were curious how difficult the process was, here's a $130 replacement and a full guide on how to do it. Not easy by any means, but not impossible.
