Hello!
I've just created Sharepoint Plan [Home - New - Plan ]
And I have a question regarding how to connect this schedule calendar with the power apps so that I can manage schedule plans from my power apps.
Please help me with this issue !
Thanks!

Hello!
I've just created Sharepoint Plan [Home - New - Plan ]
And I have a question regarding how to connect this schedule calendar with the power apps so that I can manage schedule plans from my power apps.
Please help me with this issue !
Thanks!
I suppose you want to use the sharepoint integration, where you use powerapps as the sharepoint form?
If you click the '+ New ' link in the calendar it will open the form in 'New' mode and you can add an entry.
Later if you click the entry it will open the form in view mode with that item.
You can click the 'Edit all' to edit or click the three dots ... , to adjust the form to your needs.
The one thing that unfortunately is very absent here, is a way to pass the date of the calendar day where you clicked the '+ New '.
The SharePointIntegration control is a fine place to pass this selected date, but so far MS did not feel the need for this, even though all other SharePoint forms I know can do this. So it is not like they need to reinvent the wheel.
It is probable stuck somewhere in the ideas list.
Microsoft List Calendar View and Power Apps Forms
I looked it up and voted for its implementation.