Please add the ability to use new {% content_for “blocks” %} inside a theme-app-extension (app block).
18:03:44 │ theme-app-extension │ Error while updating drafts: [blocks/wrapper.liquid] Liquid syntax error (line 2): Unknown tag 'content_for'
Thank you!
Thanks for the feature request - I’ll raise this to the Online Store team 
Thank you very much!
The main idea would be to have an app block wrapper with multiple nested app blocks.
The sections/apps.liquid liquid is pretty limited, and even for apps with theme_write access, it is challenging to help merchants with theme upgrades since the custom sections are not carried over.
The app block wrapper could solve this for many apps.