Is the Sims 3 compatible on my Macbook?

@sarah1123b  Sims 3 runs fine on the basic M1 chip most of the time.  There are certainly issues with the 64-bit version of the game, but they're no worse on your hardware than anyone else's.  If you want a preview:

https://answers.ea.com/t5/Technical-Issues-Mac/A-partial-guide-to-64-bit-Sims-3-for-macOS-in-progress/td-p/9656782

You'd need to install the EA App, as Origin doesn't work on macOS Catalina (10.15) or newer, and in a few months won't work at all.