I mean, the mRNA vaccine would work by producing specific parts of the virus so as to allow the body to mount an immune response, just like the Covid version do

I mean, the mRNA vaccine would work by producing specific parts of the virus so as to allow the body to mount an immune response, just like the Covid version does... So yes, you would expect HIV antibodies to be produced. Personally, I think most people care more about having vaccines for diseases like HIV than worrying about what anti-vaxxers and conspiracy theorists believe.