Is it possible to have your iPhone apps hacked through a 3rd party app?

Has anyone had only third party or any apps in general hacked through an unauthorized or bogus certificate of authentication?? I have a 13 max pro and have had several this hacked into I understood the I phones are next to impossible to break into but is it in theory possible the enter through a back door using a certificate of authentication that can access apps or maybe even the pre installed apps on the ppjone I’ve got a copy of a certificate that I watched being downloaded on my phone can anyone provide some answers please?

thank you,

Chad W

[Re-Titled by Moderator]