Right, the Aliexpress one. The Aliexpress dropdown menu not having a particular city has been discussed in this forum before. (Do a search if interested)
It's not an Alidropship issue. It's an Aliexpress issue. (Obviously)
All you can do is contact them (which would be a total waste of time) ...
... or work around the problem.
e.g. Choose "Other" in the city dropdown and include the city name in one of the other editable fields, like the street address field. "
456 Merril Street, Liverpool". As long as the postcode is also listed there will be no problem anyway.
All post office systems worldwide really only need "
the street address, postcode and country" to find a place.