We report the first creation of a bulk sample of ultracold heteronuclear $p$-wave Feshbach molecules in an optically trapped Bose-Bose mixture of ${}^{23}\mathrm{Na}$ and ${}^{87}\mathrm{Rb}$ atoms. Using loss spectroscopy and binding energy measurements, we systematically characterize the interspecies $p$-wave Feshbach resonances near 284 G. Leveraging this understanding, we use magnetoassociation to form $p$-wave NaRb Feshbach molecules, producing both pure samples and mixtures of molecules in different $p$-wave orbitals. We further measure the molecular lifetime and identify atom-molecule and molecule-molecule collisions as the dominant loss mechanisms. This Letter establishes a previously unavailable ultracold molecule platform that combines orbital anisotropy with heteronuclear constituents, represents a significant step toward realizing tunable $p$-wave interactions in Bose-Bose mixtures, and provides a foundation for exploring nonzero angular momentum molecules.

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• Atomic & molecular processes in external fields
• Cooling & trapping
• Molecular dissociation
• Molecule trapping & guiding