It is WooCoommerce. It is created with ACF field. But there’s no option to add it to the order page no?
I created this site almost a year ago, but it’s the most complex thing I’ve ever created. I don’t even remember how I got the (uneditable) additional fields are order screen. All I know is that I can’t edit from the screen. It wasn’t a problem with the client until they decided to want that function 1 year later.
Figured out how it gets on the user page from ACF, but there’s no option to put it on the order page.