Making our own signal processing block in GRC

I’m referring the website
https://gnuradio.org/redmine/projects/gnuradio/wiki/OutOfTreeModules
for the purpose of making my own signal processing block in GRC for
squaring the value.

I’ve completed all the steps successfully i.e. editing python and C++
scripts, cmake …/ , make, make test, and generation of xml, sudo make
install, sudo ldconfig.

There is no error occurring in any of the steps mentioned above but I’m
not finding the new block available which I created recently in GRC.
Please guide me for the same.

Thanks.