Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hi Alex,
Good day to you and hope you are doing well.
According to you description, it seems like you want to create 10 Microsoft Lists for different countries to store data, and then you want all data from these 10 lists to show in a main list, any new data added into each of the list will be updated in the main list automatically.
May I know if my understanding of the scenario is consistent with yours?
If yes, as far as I know, I'm afraid there is no out of box feature in Microsoft List which cannot meet this kind of requirement. Very sorry about the inconvenience.
I also wish to try best to help you. Per my search, you may try to use Power Automate flow to firstly merge different lists into one Excel file, then use flow to create a new list from the Excel file and get updated data automatically.
Here are some similar threads for your reference:
Merge Multiple SharePoint Lists to one Excel file Dynamically
Solved: Update Sharepoint list item from Excel - Power Platform Community (microsoft.com)
If you need further help on creating flow or you want to learn more about flow, considering we have a dedicated channel Microsoft Power Automate Community where engineers and members in that community are proficient in the knowledge of flow, to make sure you get the best support experience and professional assistance, we sincerely recommend you post a new thread in that community, they will also focus on your specific situation and provide specific suggestions.
Your patience and understanding are highly appreciated. Hope you have a nice day and stay safe!
Best regards,
Tina