Target Audience for targeting tablet devices

Hi All 

I have setup a activity to just test the Mobile:is Tablet audience and somehow this is not working for me. I digged further and found out that the user-agent which is sent in headers is used to map all the values and then target based on those values. I have tested in mac os simulator and copied the user agent for both Ipad and iphone and using this URL(https://deviceatlas.com/device-data/user-agent-tester) I am checking for the values. For mobile I am getting these values Mobile DeviceTrue  Is Mobile PhoneTrue  Is TabletFalse , and similarly for tablet I am getting these values  Mobile DeviceFalse Is TabletFalse  Is Mobile PhoneFalse. I also debugged a iphone and its user agent and found the values similar to the simulator. I have the activity setup on this URL(https://velvety-otter-fd49f6.netlify.app/) where I am changing some text content based on the Tablet device but somehow on the simulator it is not working. I wanted to check if the setup is fine for the audience (only target tablet users ) and will this setup work for actual devices or not. Can someone please provide your inputs on this and if this is an issue is it specific to IOS or also on android.

Thanks