The expose_by_default setting is not working or ignored with the current Alexa integration.
The older emulated_hue integration has an expose_by_default setting.
The google_assistant integration has an expose_by_default setting.
It would be great to have this setting the Alexa integration, I’d like to set expose_by_default to false.
EDIT: Don’t vote for this, in fact if you use the filters correctly you can sort of already do this.