I am having trouble finding a saved script. I followed this post to create a script that schedules email deletion, and I believe I saved it, but searched for it in Drive to
You can also try visiting the Google Dashbboard at: https://script.google.com/home/
This is another link to try in Google Drive, which will find all files in your Drive of type script, and restrict to those owned by you. https://drive.google.com/drive/u/0/search?q=type:script%20owner:me
Don't know if it helps but you can try by accessing this link: https://drive.google.com/drive/u/0/search?q=type:script
Also if you have a google apps account recheck with the admin if he has given you access.
Recheck your permissions at: https://security.google.com/settings/security/permissions?pli=1
In there you can try to find the script if you ever ran it using your account.
Also might worth to take a look into this dev article: https://developers.google.com/apps-script/guides/services/authorization#authorization_lifecycle_for_add-ons
Hope it helps!