Note : Deleted projects are only available in the recycle bin for 90 days. After this point, they will be permanently deleted.
A recycle button will be added in a February 2022 release which adds an additional button to the 'System' ribbon to allow deleted projects to be restored:
Pressing this will bring up a list of projects which have been deleted within the last 90 days (this feature is limited to this timeframe):
Select the required project and click the 'Restore' button:
Click 'OK'. The main project list grid will then refresh and include the restored project. The restored project can then be opened and the associated data reviewed.