how to enter m² on a mac?

Hey there,

is there ANY convenient way to enter ² on a mac? In my company we use this a lot, but it seems like there is no real way to enter it if its not a native apple product you write in.

I tried word replacements (to replace m2 with m² automatically) but this doesn't work in e.g. Chrome :(

I'm a techie, so i have no problems to copy a m² somewhere and paste it when i need it, but here are some users which are completely new to macOS and i'm looking for a more user friendly way.