Getting error while creating new simple app in PX4 Autopilot

I am new to PX4.
I am having Ubuntu 22.04 LTS, I have created px4_my_app exactly same as px4_simple_app. When I “cmake”, it’s successful, then “make” as well successful, when I “make px4_sitl jmavsim”, it gives error as:
make: *** No rule to make target ‘px4_sitl_default’. Stop.
when make clean, no error, no output.
when make distclean, error is:
make: *** No rule to make target ‘distclean’. Stop.
I am not getting what’s wrong with my changes, please suggest how can I build it successfully.
Thanks in advance.

Ok, which instructions did you follow, so which steps did you do ?

I will recreate simple app as per updated PX4 documentation page.