Canva App Development 3rd party Packages Installation Issue

I am developing a Canva app using Canva UI Starter Kit,

I had chat with Canva Chatbot that we can’t install packages in order to develop UI of Apps.
In My App i need to use Multi select component .

Can anyone please confirm that wether we can install packages or not ?


Regarding this issue I also contact Canva Support but they didnt replied and its been arround 2 months.