[Mr Lee]

The best complaint you can make is next time your looking for a new vehicle, avoid anything from Peugeot or go the whole hog & avoid anything from the Stellantis group.

Motorway use is normally gentle on a vehicle ( compared to short distance stop & start journeys in town ) as it will be up to operating temp & cruising along.
Full Peugeot service history may help - the adblue pump they should do the decent thing, as for the turbo you might get a contribution BUT if not there are places that can provide service / exchange units OR rebuild your original turbo.