Welcome to the community 
We’ve started adding collections to the app, to make it easier to find stocks that fit certain themes but we don’t have dedicated tools to help you pick stocks in the app at the moment.
A Stock screener has been requested so you could vote for that or maybe something like [Feature Request 🔧] Improved search in Discover tab. If you had a different selection tool in mind though then please do create an #ideas topic for it so that everyone else can vote for the tool 