I love using ° with is the opt-shift-8 when posting temps to indicate I'm on a real keyboard and not some device. Plus, it's just faster than typing degrees

iPhone—hold down 0 and ° should be on the pop up.

My phone has the degree sign ° but it requires me to click on numerical input then additional symbols to access, so I just shorthand it to deg.

℃ and ℉ to the rescue! https://graphemica.com/%E2%84%83

> this is a compatibility character provided for roundtrip compatibility with legacy encodings. […] The Unicode standard explicitly discourages the use of this character

(https://en.wikipedia.org/wiki/Celsius#Unicode_character)