Yoo-fi? Yoo-ef-ee?
They shoulda made it easier to pronounce if they wanted people to call it that
I do say gooey though. Because it’s easy to pronounce and has an existing English equivalent homophone.
UEFI does not.
I also say Wizzy Wig.
And usually I say sequel instead of SQL. Though I think I switch back and forth with that one, probably based on context, but I can’t explain when or why now that I’m trying to think about it.