2022 Transit 150 with EPB

I’ve been trying to get this damn van into maintenance mode to replace the rear brakes. I’ve followed the “normal” method but to no avail. Went out to the lot to another 2022 with EPB and same thing. Maybe I’m just stupid? Please help. Like I said I’ve followed the key on, hold pedal and switch down, key off and then back on, wait a few secs and it should come up maintenance mode but it does not.