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Is objective -c deprecated ? Apple support is available ?

One of my in-house iOS application was already distributed using ad-hoc provisioning profile & it is working fine on all the devices. when I updated my iPad OS to version 16 then after that I was facing issue while opening the app. issue is when I try to open the application it was showing prompt "Developer mode required". for the overcome this issue I has cerated new inhouse provisioning profile using existing (this cert is already used for adhoc - profile) distribution certificate. but still I am facing same issue. when I try to open the application "Developer mode required" prompt is showing. I notice one thing when I connect the iPad to MacBook & manually delete the old ad-hoc provisioning profile from iPad, after that application is working fine but it is not possible to delete provisioning profile manually from all iPad's. Please advice for the above issue.

My iOS Application is an enterprise application. which is hosted on my internal server(Not on App store). my app security team suggest binary file encryption for avoid reverse engineering. is it possible binary file encryption in iOS ?