Man pages matching name xmvacreatebulletinboard in section 3:

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