Allow a merchant to change an email address for an order

Sometimes customers need their email changed so they get confirmations and reminders. This is especially necessary if they entered an incorrect email. Step 1: Make Experiences "check" (via webhooks?) the email used by Shopify for the order. So, if the merchant or customer change their email for the order, Experiences automatically updates it as well. Step 2: Consider allowing Experiences to have an override that has a separate email.