The Bishops’ Advisory Committee on Church Music publishes a useful guide for payment of church musicians: it was last updated in 2022.
Guidelines-for-payment-of-church-musicians-2022.pdf
The minimum suggested fee for a wedding is €250, but should be higher when the musician is required for a rehearsal or when music has to be purchased or learned.
The minimum suggested fee for a funeral is €150 to €175 for one service, and €250 to €275 when music also is provided for the reception of the body on a separate occasion.
For music copyright queries, see www.onelicense.net