Can I know if there is any error message in Diagnostics logs or crash logs? You can collect the logs with the following steps:
https://video2.skills-academy.com/en-us/mem/intune/developer/app-wrapper-prepare-ios#collecting-logs-for-your-wrapped-applications-from-the-device
Also, please make sure the device has a PIN for encryption to work. On devices to which you have deployed a wrapped app, touching the status bar on the device will require the user to sign in again with a work or school account. The default policy in a wrapped app is authentication on re-launch. iOS handles any external notification (like a phone call) by exiting the app and then re-launching it. See the requirements of certificate, provisioning profile, and authentication.