Yes. You can view the current Nintendo Account through the user profile settings on your Nintendo Switch.
Complete these steps
- From the HOME Menu, select the user’s page you wish to edit.
- Select User Settings.
- Scroll down to the Nintendo Account section, then select Check Your Account Information.
- If Link Nintendo Account is displayed here, then a Nintendo Account has not yet been linked to the user profile.
- Select View email address/Sign-in ID.
- Enter the password associated with the Nintendo Account, then OK to view the full Nintendo Account information.