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.
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/
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.
I got the same behavior on macOS by using https://github.com/carjorvaz/macos-us-altgr-intl/blob/master...