Feed unit or widget unit with compositional layout

I'm integrating iOS SDK v3 in my iOS app.
I'm having UICollectionView(s) with it I want to attach the feed unit and/or the widget unit.
I followed the guide but I'm having compositional layout and diffable datasource for my UICollectionView.

I just want to ask how height should pass when creating compositional layout section for FeedUnit or WidgetUnit?

I tried to passing .estimated(100) for FeedUnit but it always stays 100 points of height.