Incorrect Email Address on an Apple Watch 6

Hello FishfulThinking,

Thank you for reaching out in Apple Support Communities. We understand you'd like to remove an email account on your Apple Watch Series 6. We can help point you in the right direction.

With the Apple Watch paired to a companion iPhone, you can remove the email account on your iPhone. This will update and mirror the email account that appears on your Apple Watch. To remove the email account, please go on your iPhone and go to Settings > Mail > Accounts > select the email account > Delete Account.

Then, you can re-add the correct email account by following these steps: Add an email account to your iPhone, iPad, or iPod touch

Kind regards.