Apple very recently added preferences for default browser/maps apps to iOS but as far as I can tell it’s totally broken. Resets all the time and only about 2/3rds of links open in the correct app even when it’s successfully set (especially for maps). Can’t speak to macOS. (The resetting may be fixed finally now, I’m not sure. I gave up for maps because it wasn’t worth it, which I guess was the goal).

Windows forces you to use bing/edge when you accidentally search from the launch programs menu, but I never intentionally search from there so it’s a minor inconvenience (for me). Never had it fail to respect that setting elsewhere. It also does a good job letting you set default apps for all types of files (and in fact letting apps change that setting themselves with a little user interaction) unlike iOS which only lets you change it for a few types of apps (and then through the worst designed settings menu I’ve ever seen). Can’t leave iOS behind though because I need my iMessaging.

Almost certain that macOS opens everything in my default browser of choice when clicking on a link in AirMail (Firefox).

Apple is actually worse. On iOS I will regularly click a link within an app, explicitly select “Open in Chrome” from the list of options, and it opens in Safari. Never seen anything that egregious from Microsoft.