I haven’t been deep into Unicode for a long time, so I can’t remember all the intricacies of the word “glyph”.

So I’m not sure if there are glyphs with multiple characters but there _are_ code points with multiple characters. E.g, you can enter the correct code point and still misspell a Chinese or Japanese word. This is because for Chinese Korean and Japanese characters in Unicode it is not enough to choose the correct code point but also markup the code point with the correct language.