I’ve received an email from Honda regarding confirmation that the car is still owned by me, otherwise the MyHonda app will cease to function in 14 days.
To confirm ownership, you must select code generation from the app, then a code is sent via message on the car’s touchscreen, which is valid for 10 minutes and must be entered in the app.
Process worked OK for me and received a confirmation email that registration was complete.
I also received an email stating the app was down for maintenance. Back up now but the usual mpg/mph error and trip fuel usage in litres issue remain!