Confirmed that a react-native app, running on an emulator started with M1 processor has completely different scroll behavior than the same app, started on an emulator with intel, or rosetta.
On a long list, hold the mouse button down, and begin scrolling, releasing the mouse button while your mouse or finger is still moving. Kind of like "throwing" the list. On an emulator started with the M1 processor, as soon as you release the mouse button, the scroll freezes instantly. On real devices or emulators started with, intel, or rosetta, it will continue scrolling, slow, and eventually stop, unless interrupted with another touch gesture.
To enable rosetta, I went to /Applications/Xcode.app/Contents/Developer/Applications/ in the finder, then right clicked the simulator and selected 'get info', and then checked open with Rosetta. Then restarted the simulator.