Hello, I have a 2020 MacBook Air and it will not download any of the flourishes or extra characters into my Font Book. My computer is completely up to date. I can download any font, but it never downloads the flourishes/ extra characters. Can someone please help!?

Which font are you talking about?

It’s any fonts that have flourished or extra characters! Not any specific one. Any of them that have them

I'm sorry but you'll have to be more specific in order for us to help you. Can you at least name a few of the fonts that have this issue for you?

For example, "hello", "hello honey", "Joseph Sophia", "elation script", etc.

https://www.dafont.com/forum/read/429491/adding-the-extra-bits-at-the-ends-of-letters