Should elected Members of Parliament in Northern Ireland be able to sit and participate in the Dáil?

Yes, but no voting rights.

Without the context of how it would impact dail operations or constituents either side of the border, this is a difficult question to answer. If it's with a view to a united Ireland, then absolutely yes.

Yes, northern Ireland, or how I like to call it the north of Ireland, is historically Irish territory, and areas that have been occupied, and are still occupied from this republic have the right to sit in the Dáil

governmentally they arent a part of the same country, however if the county were to choose to relinquish a position in the united kingdom government then i dont see whu not

Yes, but only participating in sessions in the Dáil that affect Northern Ireland as well as the Republic

If the topic has an effect on the island of Ireland as a whole, yes. But not a permanent seat unless we are reunified.

If it will benefit a United Ireland and peoples livelihood. Not to add ‘British perspective’ to Irish politics