Remap single key on keyboard without changing the layout?

I own a keyboard with a US layout, but I’m not based in the US and so I’d simply like to change the dollar key to my respective currency without having to switch between entirely different keyboard layouts to keep the benefit of the physical keyboard showing me exactly which button is which for all things excluding the currency key.

Does anyone know a simple way to achieve this?
Preferably GUI based solutions.

https://wiki.archlinux.org/title/Xmodmap

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