My iPhone doesn’t have proflie and devices management settings

Profile options will exist, only if any profile installed by your corporate / organisation / enterprise / School Management then please contact the system administrator of your corporate / organisation / enterprise / School Management

If you have installed any profile on your own --> Install or remove configuration profiles on iPhone - Apple ...

I have 4 devices none of them have any MDM or profile on my devices

If you have BSNL SIM. You can add a profile by downloading and installing BSNL WiFi from the App store. Install it and enable it then it will install a profile for you on your device.