Why is the symbol for the Russian invasion of Ukraine the letter "Z", while there is no such letter in the Russian alphabet?

From the article:

Various letters with corresponding meanings have been used by the Russian Armed Forces during the 2022 Russian invasion of Ukraine. The form of the "Z" symbol is a reproduction of the Latin letter Z, identical also to a capital Greek zeta. The "Z" symbol is used instead of the equivalent Cyrillic letter ? (Ze) used in the Russian alphabet, which has been described as peculiar, considering the symbol's later association with Russian nationalism and pro-Putin politics. This could be to avoid confusion with the numeral of a similar form 3, which is also used in Russia. The invasion has acquired the nickname "Operation Z", derived from the "Z" symbol.


https://en.wikipedia.org/wiki/Z_(military_symbol)#Use_as_a_military_symbol