little snitch seems to have issues with each beta, you can read about it on this forum. so not sure what problem you've solved; at some point, you'll want to update, and will probably need to uninstall or disable LS until the update is running.
If you didn't set up a separate partition for the beta, you would need to do a restore. Best bet is to move data you do not want to lose to a cloud service.
Personally, if you are having issues, I would just go back to a stable version of Mac OS.
FWIW, I’m using both Little Snitch and Little Snitch Micro on macOS 14 B2 on an M1 MBP and they both work fine. Leave them disabled and set to not start at launch if you find any issues, but they’re working as intended on my end with no wired or wireless internet issues.