Too small icons (not launcher)
in UI there are sometimes too small icons - some people are not 20y old anymore ;)
it has nothing to do with display settings. icons like e.g. indicators in camera interface (HDR, zoom value) are so small that it is hard to read what is a status of an option. The same for sim number in dialer recent calls.
it is general problem with icons providing some changing status/info. maybe it is not a problem with size only but rather icon design.