Just checked and my first Emailed invoice from Davenports is dated 12/08/2019 i have always recieved them in emails since that date.
I seem to remember having to ask for this to be done when we fell under the Making Tax Digital umbrella.
At the beginning of the year it always used to land in my spam folder mate. Then when i had moved several across to my inbox my email address started delivering them to my inbox. (Using Yahoo for this account) Probably not the same for everyone