Zend certified PHP/Magento developer

How to properly install ScandiPWA on existing magento2

Suppose I have already installed magneto 2 on my server and now I want to install Scandipwa for frontend.

I think https://packagist.org/packages/scandipwa/installer this installer is outdated as you can see the scandipwa/source dependency is not present (the version is 4.0) but in v3 the source is present and I’m able to set it up using v3 but I think v4 outdated and its doesn’t install any scandipwa deps. Please help