Alert when tasks are assigned to me across multiple SharePoint lists (private Teams channels)

Hello everyone,

In my company we use SharePoint lists (not Planner) to manage tasks inside private Teams channels.
Each project/team has its own task list, and people assign tasks to colleagues using the "Assigned To" column.

My challenge:
I would like to receive an automatic alert (email or Teams message) every time a task is assigned to me, regardless of which SharePoint list/site it comes from.

The problem is:

• I don’t know in advance when someone will create a new list.
• Power Automate triggers (When an item is created or modified) need to be configured for each list individually.
• Planner/To Do integration would solve this, but Planner is not available for private Teams channels in our tenant.

So, my questions are:

1. Is there any way to catch all tasks assigned to me across multiple SharePoint lists without manually creating a flow per list?
2. Are there any best practices for consolidating assigned tasks from multiple SharePoint lists into a single place (dashboard, notifications, central list, etc.)?

Any advice, examples, or workarounds would be very welcome! 

Thanks in advance,
Hugo Cristina