Hi @Anonymous ,
You can not create a new sharepoint list directly using power automate Although you can combine data of these lists and add to existing other list. I am not sure these suffice your requirement . here are steps you can perform to combine data of 3 list.
1) Declare an Array Variable
2) Use Get Items action of SharePoint to retrieve your first list
3) User "Append to array variable" action and select Value (List of Items) from Dynamic Content
4) Use Get Items action of SharePoint to retrieve your second list
5) User "Append to array variable" action and select Value (List of Items) from Dynamic Content
6) Use Get Items action of SharePoint to retrieve your Third list
7) User "Append to array variable" action and select Value (List of Items) from Dynamic Content
Here your Array variable will hold data from 3 list and you can perform further operation on this Array.
If this helps you , please mark this as resolved.