When you deleted the user profile, you would have seen a popup dialog asking do you also want to remove the user's files, did you select Yes?
1
Open File Explorer, then go to C:\Users.
In there, do you still see the user folder for that account and if so, are the user's files in there?
2
If not, log into that users OneDrive account in a web browser (https://onedrive.live.com/) to check if their files are still available for download from there.
3
If you are still unable to find the users files, then the only remaining option will be to use some 3rd party recovery utility to try to find and undelete the files.