A Dashboard is gone

Hi everyone. One of the looker studio that I used to edit is gone and I guess why is it but I don’t know how to fix it, let me explain with more details. I used to edit some looker studios under editor credential, the owner credentials belongs to another person. Last year one of the owner google account was deleted but the looker studio where still active until yesterday when anyone involved with the dashboard had not permissions to access it nor viewers nor editors; it seems that the looker studio was deleted but I’m not hundred percent sure about that so I don’t know how to get back the dashboard or known who is the real owner of that looker studio. If anyone has information abount how to recover my looker or know how to check the owner of that looker it will be higly apreciate.