To start with here's the guide we have MacBook Pro 15" Touch Bar 2019 Screen Replacement
Sadly Apple has made it hard as they have parts serialization so one can't replace displays without loosing TrueTone with used displays, and virgin displays direct from the maker won't have the camera firmware installed so the camera won't work!
So while Apple is now publishing repair manuals and offering parts they don't offer either for this series which prevents Apples Self repair as an option even getting a new screen from them to fix your own system! Basically limiting you to either an Apple Store or authorize service center.
Locating a used display can be tricky (if you don't care about TrueTone). As I think you are in Europe or the UK you might want to check these folks as they are one of the better sources for used Mac parts on that side of the Pond! TheBookYard - 2019 MacBook Pro Displays give them an email ping to see if there is anything new just not listed yet or even visit them if you are in area.
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