Iphone SE call app lost its favorites button

On a iPhone SE 3rd generation with a corporate account and VPN this last week several issues happened:

1.- the phone app and the contacts list do not sync, and I can´t see who is calling by the name, only the phone number appears.

2.- In Teams I can´t access meetings. It is telling me to update in configuration the use of the mic, but the option is not there.

3.- Whatsapp Business lost its sync to the contacts app. The same, it tells me to give permission to the app to use the contacts list, but the option is not there on configuration.

4.- If i go into the contacts button on the configuration tab, no apps appear in the list which are capable of doing a sync with the contacts list.

5.- In teams I try to share a photo, but a message appears to give authorization to the camera app to uploado the photos from there, and the option in configuration to use the photos from the camera is not there as well. But, I can send pictures to users in Teams from the Photos app sharing into a Teams specific user.

It seems a problem with the version, but there are no updates to be done on the phone.

Please send your comments.