Man pages matching name xmvacreatemanageddrawingarea in section 3:

XmVaCreateManagedDrawingArea.3.en	debian 10 / libmotif-dev
XmVaCreateManagedDrawingArea.3.en	debian 11 / libmotif-dev
XmVaCreateManagedDrawingArea.3.en	debian 12 / libmotif-dev