Hey Cassie! I think Philip here would have extended his support, both publicly and privately, to Nico upon his coronation. He is only the Crown Prince and the Queen Mother is very much in control of the UK, but with them having lost of both their parents very young, Philip would see a mutual perspective they share.
And also, while the UK and Ireland have a spotty history, Philip is rather fond (though not overly fond!) of his wife as well. It could certainly be something that could be used later in some form or another.