Hi there and welcome
If you haven’t yet emptied the iPhoto Trash, do the following:
Select Trash in the Source List
Select the photo you want to restore.
Choose Photos > “Restore to Photo Library.”
You can also drag the item out of the Trash into an empty part of the Source list.
This will return them back
I can also do these steps for you, and have made a request via Additional Services. This is optional, and if you choose to do this, I can, with your permission, remote into your computer while you watch and do all these steps (and deal with any problems that arise during them) for you. Or if you do not choose to take this service, we can continue here. This is no problem at all. Just let me know please.
Let me know the results please.