Get xcodeproj and ruby 2.7.0 into the PATH

I would like to use ruby 2.7.0 and xcodeproj to get Nativescript work on macOS (version Big Sur 11.2.3).

I did a clear install on my MacBook Air 13" 2014, following this links’ instructions:
https://github.com/NativeScript/docs-new/blob/develop/environment-setup.md

After all these steps NativeScript misses xcodeproj.
If i type xcodeproj --version into the terminal, it prints command not found .

Also this is my gem env dump:

 RUBYGEMS VERSION: 3.2.15
  - RUBY VERSION: 2.7.3 (2021-04-05 patchlevel 183) [x86_64-darwin20]
  - INSTALLATION DIRECTORY: /usr/local/lib/ruby/gems/2.7.0
  - USER INSTALLATION DIRECTORY: /Users/myusr/.local/share/gem/ruby/2.7.0
  - RUBY EXECUTABLE: /usr/local/opt/[email protected]/bin/ruby
  - GIT EXECUTABLE: /usr/bin/git
  - EXECUTABLE DIRECTORY: /usr/local/lib/ruby/gems/2.7.0/bin
  - SPEC CACHE DIRECTORY: /Users/myusr/.local/share/gem/specs
  - SYSTEM CONFIGURATION DIRECTORY: /usr/local/Cellar/[email protected]/2.7.3/etc
  - RUBYGEMS PLATFORMS:
     - ruby
     - x86_64-darwin-20
  - GEM PATHS:
     - /usr/local/lib/ruby/gems/2.7.0
     - /Users/myusr/.local/share/gem/ruby/2.7.0
     - /usr/local/Cellar/[email protected]/2.7.3/lib/ruby/gems/2.7.0
  - GEM CONFIGURATION:
     - :update_sources => true
     - :verbose => true
     - :backtrace => false
     - :bulk_threshold => 1000
  - REMOTE SOURCES:
     - https://rubygems.org/
  - SHELL PATH:
     - /usr/local/bin
     - /usr/local/bin
     - /usr/bin
     - /bin
     - /usr/sbin
     - /sbin
     - /Library/Apple/usr/bin

If I navigate to my xcodeproj installation:

/usr/local/lib/ruby/gems/2.7.0/bin

then I run

./xcodeproj --version

it prints out the correct version of the xcodeproj installation.

Also some people suggested to check pod installation and it works fine pod –version prints it’s version.

Also I got xcodeproj (1.19.0) in the list if I run gem list

How can I fix this to get the xcodeproj binary into the path?