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We investigate whether the recently observed 2.6 $M_\odot$ compact object inthe gravitational-wave event GW190814 can be a bosonic dark matter admixedcompact star. By considering the three constraints in mass, radius andstability of such an object, we find that if the dark matter is made of QCDaxions, their particle mass $m$ is constrained to a range that has already beenruled out by the independent constraint imposed by the stellar-mass black holesuperradiance process. The 2.6 $M_\odot$ object can still be a neutron staradmixed with at least 2.0 $M_\odot$ of dark matter made of axion-like particles(or even a pure axion-like particle star) if $2 \times 10^{-11}$ eV $\leq m\leq 2.4 \times 10^{-11}$ eV ($2.9 \times 10^{-11}$ eV $\leq m \leq 3.2 \times10^{-11}$ eV) and with decay constant $f \geq 8 \times 10^{17}$ GeV.

Can the GW190814 secondary component be a bosonic dark matter admixed compact star?