Spin defects in hexagonal boron nitride (hBN) are emerging platforms for quantum sensing. The negatively charged boron vacancy (<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">mml:msubsupmml:mrowmml:miV</mml:mi></mml:mrow>mml:mrowmml:miB</mml:mi></mml:mrow>mml:mrowmml:mo-</mml:mo></mml:mrow></mml:msubsup></mml:math>) is widely studied due to its robust spin properties, but its low brightness often requires plasmonic enhancement, limiting sensing in optically opaque or scat