MaeCyd-ddatganiad a Chynllun Gweithredu ar y Cyd Iwerddon-Cymru 2021-25yn cynnwys 6 maes cydweithredu ar faterion datganoledig, sef:
TheIreland-Wales Shared Statement and Joint Action Plan 2021-25include 6 areas of cooperation on devolved matters, these are: