Specific limits for specific apps

I would love an option to set different time limits for different apps. for example:

Instagram=45min limit

Pokémon Go=1hr limit

Or even just,

Social apps=45min limit

Game Apps=1hr limit

I don’t want to spend 1hr playing games on my phone, maybe just 30mins, but I don’t want the option to spend 1.5hrs scrolling social media.

I hope it’s possible to do from an app. That is something I really miss about my Pixel phone, each app could have its own limit. Don’t know why apple hasn’t thought of that