Liechtenstein is like another canton in Switzerland. It uses the Swiss Franc and the Swiss postal system. You pass through it in the blink of an eye as you drive through northeastern Switzerland heading towards Austria.
I lived in Canton Glarus in the 80’s and occasionally we would drive to Vaduz to visit a disco there that was quite popular at the time.
My daughter was in Liechtenstein at some point today - on her way to Austria as part of a seven country tour. I’m glad she is able to see Europe while it is still Europe. I will most likely never get that chance.