Provide an option to hide webparts in modern webpart toolbox
Please give us the option to hide webparts on a site level from the webpart toolbox. E.g. if I don't want my users to use the twitter webpart or any other custom or OOTB webparts. Currently there is no way to control what webpart is visibile on what sites. We could do this in classic by adding/removing webparts from the webpart gallery. Some webparts just don't make sense on certain sites. Some webparts don't work on certain sites. There are so many reasons, this is just a must-have!
I think the option to hide webparts should also be available on tenant level.