Declaring a TMap in Unreal using a Noesis::Ptr as the key:
TMap<Ptr<UIElement>, FNoesisUIChild> Children;

No longer works in Unreal 5.2.

This is because Unreal have removed the following code from TypeHash.h in 5.2:
inline uint32 GetTypeHash( const void* A )
{
return PointerHash(A);
}

inline uint32 GetTypeHash( void* A )
{
return PointerHash(A);
}

So now when you compile you get the error:
C:\Program Files\Epic Games\UE_5.2\Engine\Source\Runtime\Core\Public\Containers\Map.h(117): error C2665: 'GetTypeHash': none of the 5 overloads could convert all the argument types

A temporary workaround for this is to include the old code from 5.1 as a free function.