"Ask for More Time" is the well-known one. It can be tapped again and again with no hard daily cap built in, which is exactly the loophole that makes an app limit feel like a suggestion instead of a rule. Apple has since made "One More Minute" available once per day regardless of other settings, another small door that opens on its own.
Changing the date is a quieter one. Screen Time's limits are tracked against the system clock, so setting the date or time forward or backward under Settings can stop a limit from applying at all. It's a widely documented workaround, not a secret, and it doesn't require breaking anything.
There's also a timing gap right after a restart. Some iOS versions have a roughly 30 to 60 second window after rebooting where Screen Time limits haven't re-activated yet, long enough to open a restricted app before the restriction catches up.
None of these are Fella's problem. Its block doesn't depend on the system clock or a reboot timer, and there's no "more time" request to grant, because the only exception is the same fixed 5-minute unlock, once per session, on Fella's own schedule.