Agreed on above statement, I'd move both in a little so that it will be easier to clean the sides Of your tank in the long run. I'd make them atleast a hand width.
I agree with the others and I’d personally glue the rock, especially the piece up top on the right, if it’s not already. Doesn’t look super stable and you don’t want a collapse!
Looks good. On right side, do the 2 rocks on the top rest on each other? If so, you may want to glue those together to avoid disaster of something getting smashed.