That's one aspect I really love about macOS. I'm from a small country so nearly no one makes hardware with our exact layout, but with macOS I can always just long press to fill in the gaps. I just wish all apps used native inputs, not some weird half-baked solution they built themselves.
I rarely miss Linux, but I liked being able to have compose keys, most of which were very logical and fast to type. Now on MacOS, I either have to know the option (alt) combination or long press, which makes my writing with accents way slower.
My favorite Linux layout was US International + AltGr dead keys. Basically a US keyboard, but if you want an accented character, just press the AltGr+Accent key, then the letter.
If you frequently write the same characters, it's straightforward to create your own keyboard layout that matches your usage, using https://software.sil.org/ukelele/
Same with image viewers on the web. Google, twitter, imgur, and others seem hell bent on making the shittiest possible zoom and pan implementations to look at images.
