True — that would be a limitation of using a physical keyboard to input the password on someone else's Windows computer. In many ways, you can use the on-screen keyboard. If you're logging into Windows, it might be a problem. However, if you're on their Windows machine, you could just use charmap.exe.

I forgot game consoles. Xbox and Switch have access to accents as well. I imagine PlayStation does as well, but my last PlayStation was a PS3 (still own it).