Your family calendar outlook.com

Hi,
I recently removed all members from a Microsoft Family group I had previously used for years to monitor kids screen time etc.
I did not realise that the "Your Family" shared calendar in Outlook was associated with the family group, and as a consequence the calendar has now disappeared.
I thought that the calendar was a shared calendar I had created years ago so that myself and my wife could monitor shared events etc. Clearly not.
First question - Is there a way to restore the deleted calendar?
Second question - I've added my wife back into my family group, how long do I need to wait before the new "Your Family" calendar is created?
Thanks in advance
Matt