Allow adding additional attributes to iframe element e.g. https://git.drupalcode.org/project/iframe/-/blob/8.x-1.x/src/Plugin/Fiel...
Add additional fields to media type when \Drupal\media\MediaSourceBase::submitConfigurationForm() creates source field.
Create a patch.
Add tests.
Review.
Rejoice.
UI will allow you to select values for additional iframe attributes.
API addition.
Additional fields on the media type add/edit form.
Needs work
1.0
Code
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
Hiding #2 as it is not relevant; resetting issue.
Wonder if this should be closed for 📌 Support additional attributes in Needs work