Teams Channel Plan Duplication Flow

I need a Power Automate cloud flow that can spin up a brand-new Microsoft Planner plan inside an existing Teams channel, cloning it from my pre-built template plan. The flow has to rely only on standard Microsoft 365 connectors—no custom API or HTTP actions—so it will remain fully within our tenant’s default licensing and governance rules.

The trigger must fire automatically on a specific event; creation of a new channel creation once the project starts. After the trigger, the flow should:

• Create a fresh plan in the designated Teams channel.
• Duplicate every bucket, task and sub-task from my template, preserving due dates, descriptions, check-lists, labels and assignments.
• Carry over comments and file attachments where possible with the out-of-box connectors.
• Finish by sending a Teams notification confirming the new plan is ready.

Also need to enable a timed usage for each task ie Add a flow so when a new task is created in Planner, a related record (in a List, Excel, or Dataverse table) is created with an “Estimated Minutes” field of how long a task should take as I want to report actual v's budget. Planner only allows for dates not times, open to another workaround if required

Deliverables I expect:
1. The working flow exported as a .zip package that I can import into my environment.
2. A concise setup guide (screenshots or short video are fine) showing connector permissions, variable mappings and how to switch the trigger event.
3. A quick validation walkthrough proving the cloned plan matches the template.

Keep the configuration straightforward so any future changes—like swapping in a different template or target channel—can be done by a power user without editing JSON.