Hi @alb15 Yes, seems that's correct. I just did google and seems like this default option iPad automatically requests desktop versions of sites however user can request for mobile version site through Safari settings.
Now in this scenario, seems there is no built in option in Adobe Target so you've to look into workaround and write a custom script to identify iPad.
1) You can use the navigator.platform property which returns a string identifying the platform on which the user's browser is running and
navigator.maxTouchPoints returns the number of touch - so this helps you to identify the device with touch (like iPad)
here are the example.
https://developer.mozilla.org/en-US/docs/Web/API/Navigator/platform
https://developer.mozilla.org/en-US/docs/Web/API/Navigator/maxTouchPoints
https://stackoverflow.com/questions/57776001/how-to-detect-ipad-pro-as-ipad-using-javascript
2) Screen dimension - you can detect height and width of iPad using methods like window.screen.width;window.screen.height;
You can try this options or you can combine both scripts results while creating the audience and see if this works for you.
Hope this helps.