As a person who has actually enlarged a 35 mm colour negative to 6 metres wide, directly onto colour photographic paper in a darkroom, I would agree that you could enlarge negatives I have from my Horizon 202 camera to that size.

But, and there is always a but, sharpness and/or whatever, is relative.

You don't expect to be able to stand 1 metre away from a 6 metre wide enlargement, you just couldn't see it. You have to stand back quite a bit, at which point any apparent softness, and there will be softness, is diminished to a point where it doesn't matter.

I always listen to what people have to say, then conduct my own tests. I believe you should simulate a 6 metre wide enlargement by wall projection with your enlarger, then, and only then, will you have the true answer regarding your lens on your camera.