Hi everyone and thanks for your patience! I have some great news to share with you today:
Sections are finally back in iOS 
All you need to do is update your Asana app to the latest version (7.16) and you will get the “add section” button in an overflow menu in projects (See screenshot below)
Our team is still working on re-adding the ability to create sections to the Android version, and I’ll make sure to keep you posted as soon as I have an update on my end! Thanks for all your patience and understanding so far, we really appreciate it!