“Could this be applied to in vitro meat”
not necessarily. IT depends what you mean by”in vitro meat”
Usually the starting cell is a cell that allowsfor rapid proliferation like an animal embryonic stem cell. Now if this cell is fleishigs (or treif) arguably it is never batul as it is a davar hamamid. Thus it isnt quite the same as using completly artificial means or Sefer Yetzirah. OF course completly artifricla meat using chemicals in a lab with no animal derivatives would be pareve.
I’m not sure why you mention ever min hachai, In vitro meat isnt a living animal