Good spyware prevention apps for iPhone iOS 16.1.1

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Delete suspicious content from your devices

Delete suspicious content from your devices – Apple Support (UK)

Manage and use your Apple ID

Manage and use your Apple ID – Apple Support (UK)

If you think your Apple ID has been compromised

If you think your Apple ID has been compromised - Apple Support

See who has access to your device or accounts

See who has access to your iPhone or iPad – Apple Support (UK) 

Never jailbroken your iPhone,

It is highly unlikely that spyware was installed on your phone, as it requires physical possession of the phone while it is unlocked. However, if you have any doubts restore your phone to factory settings and do not restore a backup→Restore your iOS device to factory settings - Apple Support. Also, change your Apple ID password→Change your Apple ID password - Apple Support. Doing these two things will guarantee that there is no spyware on your phone.

Have you check the first link I posted:

Delete suspicious content from your devices

Delete suspicious content from your devices – Apple Support (UK)