The following need to be backported to 6.10, 6.11 - [x] https://github.com/ember-cli/ember-cli/pull/10932 - [x] https://github.com/ember-cli/ember-cli/pull/10969 - [x] https://github.com/ember-cli/ember-cli/pull/10976
The following need to be backported to 6.10, 6.11
use-ember-modulesin blueprint optional-features.json #10976