\enabletrackers[fonts.combining.all,fonts.goodies]

\definefontfeature[default][default][compose=yes]

\loadfontgoodies[lm-compose-test] % playground

\setupbodyfont[modern]

\starttext

\startTEXpage[offset=1cm]
    B\quad\char"1E02\quad\char"1E04
\stopTEXpage

\stoptext
