If you deleted a macOS user account from this laptop, then it is possible the data still resides within the "/Users" folder, but it may be hidden by default. Look in the "/Users" folder for a folder or .dmg file with the short user name of the account you deleted. If you don't see it there, then with the Finder window with the focus, press the following keys to toggle on & off the ability to see hidden items in the Finder:
Command + Shift + .
The last of the three keys is the period or dot.
FYI, not all folders have hidden items.
If you already deleted the macOS user account from within the "Users & Groups" System Settings, then it is safe to delete the folder or .dmg file for that former account.
Here is an Apple article for reference on several options to preserve the data from a deleted macOS user account:
Delete a user or group on Mac - Apple Support