problem with bundler not installing gems for different platforms

I use a Mac locally and in my Gemfile.lock, I have both platforms:

PLATFORMS  arm64-darwin-23  x86_64-linux

so when I bundle install I get nokogiri-1.16.7-arm64-darwin.gem in my Rails app's vendor/cache. But I'd also expect to see x86_64-linux version but I am not seeing it.

Is there a way I can force bundle to download the linux version in addition to the arm version? I'm not sure why the PLATFORNS directive is being ignore.