NPM 7 workspaces - how to install new package in workspace?

If I have a NPM 7 workspace like this:

root
   - submodule0
   - submodule1
   - submodule2

and I navigate to the submodule0 directory and run npm i somepackage it seems to "break" the workspace by creating a new package-lock.json in the submodule0 directory and installing all the dependencies there. In other words, it just does the old behavior that existed before I created the workspace. I was hoping for a command similar to lerna where I can install a new package in submodule0 from the root. Something like:

npm i somepackage --scope submodule0

So far, the only workaround I can find is to edit the submodule0 package.json and add the somepackage manually. Then run npm i from the root. Obviously this is not ideal because I need to look up the @latest version, navigate to the subdirectory, open the package.json, etc. etc. as opposed to just typing one line in the root.

Workspace support for npm install and npm uninstall was added in npm v7.14.0. You can now just do:

npm i somepackage --workspace=submodule0

Uninstalling modules has been the biggest pain, so this is really exciting. The npm team seems to be slowly adding support to commands one by one. Follow updates here: https://github.com/npm/cli/blob/latest/CHANGELOG.md.

I'm also baffled with why npm workspaces has been released without this functionality.

My current workaround uses the add-dependencies package, which adds dependencies to a declared package.json file, whilst skipping the installation process.

npm i add-dependencies -g

Then, from top level of the monorepo, you can run:

npx add-dependencies ./submodule0/package.json somepackage && npm i

Hopefully a --workspace argument will be added to npm i soon to avoid this faff.