Widget problem at plus membership

I bought a Plus membership. I’m in the trial period. Although it is stated that there are 40 widgets in the Plus membership, I cannot see most of the widgets in the list on the left in the web dasboard in developer edit mode. For example Button, Styled button, Icon Button etc. May I know your reason? Thanks.

There are 40 mobile app widgets in the Plus/Pro/Business collection (known as the Pro widgets).
There are also 10 web dashboard widgets in the same collection.

If you take a look here, and click the “i” button next to the Pro app and web widgets you’ll see a list of what is available…