To get the most important things out of the way, this can be done only within the first 7 Days.
At times, you want to delete an environment you don’t need. But you feel you do need it back. Deleting an environment from the Power Platform Admin Center will Soft Delete it and you can get it back within the first 7 days only.
Here’s some info by Microsoft on that:
Continue Reading priyeshwagh777’s Article on their blog
Recover deleted D365 PowerApp environment using PowerShell – D365 Demystified
Here’s how you can retrieve PowerApps environment within first 7 days of Soft Delete using PowerShell
Blog Syndicated with priyeshwagh777’s Permission