@import not working in addon with ember-cli-sass

Addon has

// app/styles/my-addon.scss within addon
@import 'pods';
.testing123 .my-addon {
  color: white
}

// app/styles/pods.scss within addon
// @import 'some components go here';
.testing123 .pods {
  color: black
}

This works in the addon's dummy app. However when I build it into a real app:

// app/styles/app.scss
@import 'my-addon';

Now my app css contains

.testing123 .my-addon {
  color: white
}
// expect to see .texting123 .pods _but don't_

ember-cli-sass ^7.2.0 and ember-cli-sass-pods ^1.3.0 are both in addon's dependencies.

What am I doing wrong?