It will be great to see another new components here. So my request is, You should add the following components.
1) Blur View
Benifits - We can create glassmorphic UI by playing with blocks related to blur and opacity. As you know glassmorphism is trending in 2021. Also some other UI designs are possible.
2) Android PopUp Window
Benifits - Android popup window is useful for dropdown as well as in popups. It gives more customizations than popup menus.
3) Recycler View
Benifits - Recycler view is required while loading a lot of list items. If we use normal listview or dynamic components sometimes app lags and crashes.
Actually we can show popup windows as a dropdown also (using custom arrangement, which is different than popup menu and provides more customization as it takes arrangement as a input.)