libqscintilla2-qt6-dev 2.13.3+dfsg-2 (armhf binary) in ubuntu lunar

 QScintilla is a text editor for Qt6 with features especially useful when
 writing and debugging source code. These include support for syntax
 styling, error indicators, code completion, call tips and margins.
 .
 This package contains development headers needed when developing
 C++ applications that use QScintilla 2 and Qt 6.