packageManager field is automatically created when I use any npm packages.

[melodyxpot]

Hi everyone.
I have something to curious and want to ask about it in this place.
When I install the npm packages using any npm package manger like Yarn, Pnpm, etc, packageManager field is automatically created and the package manager version is set as a value.

I started to make open source and all of them doesn't require a specific package manager.
I want to know if this is general feature or an issue.
And I want to know if it is okay to remove packageManager when I push new update to my GitHub.

Feel free to answer. Anything will be helpful.
Thank you.