As @.yana said, not many countries stamp em anymore. Lots of facial recognition and e-gates these days. More participants in GE, too.
The US is the most reckless when it comes to stamps. CBP seem to open to a random page and stamp. My old, old CAD passport has 7 CBP stamps on 5 different pages in that passport, one of which is the signature page that I don't think they're even supposed to stamp. Some of the stamps are poor and barely legible, too. I can't check the latest passport - sent it Monday for renewal, but I'm positive it has some special repeats like that in it, too.
Most other places seem to keep the stamps together. When we went to the UK & EU in 2023, the UK was e-gates at Heathrow, but we did get stamps for exit/entry into the EU when we took the chunnel and then when we flew back to the UK. Everything was on the same page, differentiated by the little train or plane symbol, and were stamped on the same page as a previous trip to Germany via Frankfurt.
Japan has neatly placed, fancy stickers with QR codes that they stick in and invalidate with a stamp upon exit. Malaysia and Argentina seemed to stamp neatly, too. The entrance and exit stamps are always carefully placed. UAE was more random like the US.