Maranta I don't know what keyboard you have on your IPad but I accessed bold, italics and underline function by swiping up the keyboard and it reveals a line of mini icons to use. So you press the bold icon and type the word and then press it again to stop the bold. You can't use this function on GN as they have their own method of bold etc.
I also learned from this YouTube demo that if you hold down any vowel it will give you options of adding an accent for foreign words. You just keep your finger on the key and slide it to the accent you want.
The finally part of me being a clever dick (if I can use that word in present company) if you want a degree symbol type the number e.g. 80 then hold down the nought and slide to the degree symbol. Yet again I can't demonstrate this on GN.
Lesson over please walk out in single file ?