Relocate Vent Pipe - Tricky | Terry Love Plumbing Advice & Remodel DIY & Professional Forum

I have a situation I need the communities help. We used to have a tub which had a tiled frame around it. To our surprise when we remove it we fount this vent. We intend to put a free standing tub but need the vent pipe to be hidden. There is a header/beam in the way. I don’t want to cut into that. Any suggestions? What’s the right way to do this ?