Yea, tubeless plugs do exist, but probably not these.
One vague auto-translated review suggested they worked with tubeless but, you know, it was vague. And auto-translated.
Claim is that it is lighter than rim tape, but the difference either way must be inconsequential.
Extra points of potential failure could mean a messy experiment...
I love the idea of UST rims. The wheel builder I work with, less so. Lol
Thanks for input all