I have just discovered that Safe Kids on Xiaomi phones is useless. On my daughter's Redmi Note 7 there is "Ultra battery saver" ( UBS from now on ) in shortcut buttons on top. If Safe Kids is activated/running and even if the phone is blocked by time limit,simply activating UBS and then disactivating it, Safe kids is no longer running and the app is useless. You have to restart the app and then reenable accessibility to make the app functional again.I tried every possible way to block this,but unfortunately no success. Off course,my daughter stayed quiet about this and was using the phone with app disabled for a few months until I realised what is happening.
Can others that have Xiaomi phones test this to confirm?