there have been built? is this sentence okay?
There have been built many skyscrapers in my hometown.
there have been built? is this sentence okay?
why :Many skyscrapers have been built in my hometown. ?

Question

there have been built? is this sentence okay>?
There have been built many skyscrapers in my hometown.
there have been built? is this sentence okay>?
why :Many skyscrapers have been built in my hometown. ?

Answer

Because English grammar is SVO.  Subject, verb, then object.  
The first sentence is verb, subject, object.  So it sounds improper.  
Hope this helps!

Answer

Many sky skappers have been built in my hometown.