we need to compile the qt-webengine along with qt in the depends structure like bitcoin
you will need to change the [login to view URL] in order to compile with qtwebengine.
the qt-webengine needs to be using the same dependency as qt.
you need to know about autotools, qt compilation and bitcoin depency structure.
This should be an easy task if you already have this kind of experience.
qt/webengine are big modules and they is a time consuming task.