raise vocal in a mix

I want to raise the vocal slightly in a finished track without increasing the backing is there anyway to do this Thanks

maybe: if the vocal is centre-panned.

Audacity can isolate centre … https://manual.audacityteam.org/man/vocal_reduction_and_isolation.html

NB: other instruments like bass & percussion could also be centred, so only boost the vocal-range of frequencies, say 200Hz to 5000Hz

There is a free plugin from voxengo: overtoneGEQ
it his 2 equalizers (with sliders), one for mid (centre) one for side.

by raising the mid sliders only you could make center-panned vocal louder in the mix.