qtbase5-gles-dev - 5.15.10+dfsg-6 main

Qt is a cross-platform C++ application framework. Qt's primary feature
is its rich set of widgets that provide standard GUI functionality.
.
This package contains the header development files used for building Qt 5
applications.
.
Normally you should use the qtbase5-dev package. Use this one only if
your software supports only OpenGL ES or if you want to make use of some
OpenGL ES specific API.
.
If you are interested in packaging Qt 5 stuff please take a look at
https://qt-kde-team.pages.debian.net/packagingqtbasedstuff.html