In trying to be helpful, this may not be of much help (because 10 I don’t play it and 2) I don’t use an iPad), but just in case…
Someone on this thread may be able to help Welsh version of Wordle -- Gairglo (too many people to tag individually)
Also - though I’ve no idea if it’s available for or works on iPad - there is the “to bach” programme that Bangor University developed which enables you to type ^ from a standard keyboard https://www.bangor.ac.uk/cymorthcymraeg/to_bach.php.en
There are also “Alt” codes you can use on a keyboard https://altcodeunicode.com/alt-codes-letter-y-with-accents/ (again, I don’t know how these translate to iPads.)
Hopefully someone who does play Gairglo on an iPad will be able to help better.