Unicode 13 added the 3x2s and 16 the 4x2s. https://en.wikipedia.org/wiki/Symbols_for_Legacy_Computing and https://en.wikipedia.org/wiki/Symbols_for_Legacy_Computing_S...

Thank you. I was searching for 3x2 and combination and the likes.

3x2 were more popular, used in, among others, Teletext and the TRS-80. The only place we found the 4x2s was the Kaypro portable (using the upper 128 positions of the character generator plus a reverse video bit to get all 265 combinations).