Man pages matching name buoyantboussinesqsimplefoam in section 1:

buoyantBoussinesqSimpleFoam.1.en	debian 10 / openfoam
buoyantBoussinesqSimpleFoam.1.en	debian 11 / openfoam
buoyantBoussinesqSimpleFoam.1.en	debian 12 / openfoam