My Iphone 11 detected with Jailbreak

I replaced my old IPhone 8 Plus with Iphone 11 in early this year.

Performed restore of data to the new Iphone 11. Recently some apps notify me that my iphone 11 is jailbreak. How can it be ? How can i check ? And if it really jailbreak, how can i remove it ?

Hope to get some help. Thanks,