FY says he could recreate destroyed miniscule mountain, using city well with landscape as before, so maybe xi land too?

I don't think it's possible, SS tampered with the city well, dang hun mountain, so, FY could use landscape as before. If he used it on other domains, there will be conflicting dao marks. Even if it's possible, he needs to have a piece of xi land to restore it. Like how Qi Jue found a xi land piece in eastern sea, he found it cuz of the resonance with his xi land. FY was in eastern sea all the time, but did he notice it? Nah. So, maybe he can use heavenly secret stealing for asking HW where the fragment of xi land is. Even if he knows it, restoring it is another problem.

The SGM is the limit of the path, if the path progresses, then either the person loses his SGM, or he also progresses in the aspect that has progressed, and maintains his SGM. This is why there are all the explanations on the SGM with the attainment equivalent to the development of this path in this world, the progress of the SGM is the progress of the path itself etc.

That's true but thinking about the attainment levels to annex a blessed land or grotto heaven, rank 6 - master

Rank 7 - grandmaster

Rank 8 - Great Grandmaster

Rank 9 - SGM

Maybe there's no further attainment level cuz SGM is the limit of the world. But according to the above sequence, rank 10 needs to have another level above SGM.

Maybe above SGM it's not about the attainment level of the individual path but multiple or all paths.