So I been playing for a long time and i have 3 Mr. Handy from lunchboxes and I always send them to collect caps and it usually takes for 3-4 days to collect 5000 caps. During the loading screen the hints says "Send Mr. Handy to the Wasteland to collect CAPS and items" but it doesn't collect items. Whats the explanation behind this?

Bethesda played you for a fool. Mr. Handy's only collect caps.

Contact google play/apple store support and request a refund on terms of false marketing. You were deceived and the product you bought does not behave as advertised.

That's the Android Surprise. The tip in the Android version claims he collects items too, but he doesn't.

Google should refund on request, as it is a trade misdescription.