  We construct Lax matrices of superoscillator type that are solutions of the
RTT-relation for the rational orthosymplectic $R$-matrix, generalizing
orthogonal and symplectic oscillator type Lax matrices previously constructed
by the authors in arXiv:2001.06825, arXiv:2104.14518, and arXiv:2112.12065. We
further establish factorisation formulas among the presented solutions.
