Sure, tech can exist. Doesn't mean it is cheap. Plus some of the things proposed would have their own challenges in terms of how to process them without ready access to certain things, like water (since you need water for keeping people alive, and there is less of it, you dont want to waste it on manufacturing)
I don't see anyone actually setting up to do space industries as have been described. Studies, sure. Making the actual stuff for actual use? I haven't heard of any practial progress at this point. I mean, until there's actually a concrete way to get to the moon (or other mass in space), a company isn't going to find investors to pay for equipment for in-space mining and construction.
I certainly don't see any commercial venture paying 1B a launch for SLS cargo runs (assuming one was even available as they're planning at best one launch a year).
This just takes us back to SpaceX. They're the only way space mining or construction in a larger scale is going to happen in the not horribly distant future.
Now, if some commercial company has actually gotten a mission and rocket lined up to do these things, please post it here. But I suspect no one is actually putting money where their mouth is.