I also find this omission massively irritating, You can get the billing address but not a delivery address, and none of the additional fields which make the webhook actually useful. It would be minor development effort to make the extra fields available to the webhook as they are available in the CSV download.
Right now, the only workaround is to pay for a CSV export App from the Wix marketplace. Not an ideal solution but it will send you a 2 x CSV files with every order which includes all the fields.
Wix, please improve your Orders webhooks, to add all the fields, surely very easy to do!