How do i get more than four playable sims

Sorry, @EEEEAAAAsims at this time there's only room for four sims per account. Many players have a second account on another device so they can have more.

Also, you can check out this thread where players have suggested new content that they want the most. You can see if someone else has requested the same and give them an XP to show you agree, and at the end you can put in your own requests.

https://answers.ea.com/t5/General-Discussion-Feedback/Your-top-5-wishes-for-2020-for-The-Sims-Mobile/m-p/8555197#M23003

Hopefully EA/Fire Monkeys read all of our suggestions and that helps them determine the new stuff we get.