Could you provide more explanation about "X,Y"? Is this the name of the two column and what their types are.
And what do you mean by the Date field that you mentioned, I hope you could provide more details about them.
I did a test on my side and tried to combine the three conditions you mentioned to filter the items.
Assuming X, Y are two single-line text type fields, and the configuration of the two lists is the same, you could copy the data in the following way.
1. Set Recurrence as the trigger to trigger Flow at the specified time each day.
2. Configure Get items action to get the items in listA, and configure Filter Query to get the eligible items. Determine if the value of the ‘Created’ field is less than utcNow() and greater than this time of the day.
3. Use Apply_to_each to traverse the items obtained, use Get items to get the existing items in ListB, you could consider using ID to determine whether listB contains the current item.
Or use other fields that can identify unique items as the basis for judgment, according to your actual situation.
4. Use Length() to check if the number of items obtained from Get items from B is equal to 0.