what are these on "app limits"?screenahots , user authentication , authkituiservice

• Screenshots are digital images taken of your iPhone screen.
• AuthKitUIService is a task that runs in the background of your iPhone that handles your sign in with your Apple Account.
• User Authentication is the process of verifying your identity by requiring you to enter your biometrics or passcode for applications.

Do not provide cropped screenshots.

To improve my understanding of the phenomenon, it would be highly beneficial if you could share a full screenshot (Do not crop it). Visual representations carry a greater impact than written descriptions.

Please remember that this is a public forum, so when attaching a screenshot, please avoid including any personal credentials such as IP addresses, card details, email IDs, Apple IDs, IMEI numbers, serial numbers, phone numbers, order IDs, or any identifiable location information if you are sharing a map.

With the limited information that you have provided, It is hard to even guess the problems faced by you. 

You may get faster and better responses to your query by --> Writing an effective Apple Support Commun… - Apple ...

Please re-post with detail so that someone else can help.