My insurance policy has missed departure cover.
For each insured-person this insurance will pay:
...............
3 you the amount shown on your policy schedule compensation on your policy schedule for alternative transport to get you to your
destination:
(a) the car in which you are travelling to your international departure point becomes undrivable due to mechanical failure or
being involved in an accident, or
(b) your public transport is delayed, preventing you from getting to your international departure point in time to check in.
You will need to obtain independent confirmation of the circumstances.
The situation described is not a 'connection' but if you have two consecutive flights and the first is delayed preventing you from getting to the second, it would seem to me to be covered by the clause I've highlighted in red. The first flight is 'public transport' and although I don't think that is what was intended when the policy was written, I think they'd have to cover it.
MCTs only apply to official connections.