IOS 16 with the old Field Test design

Hello I just found that a new design of the filed test been released with ios 14 with a dashboard and new features, however I still have the old design with the latest ios. Is it related to the carrier or the phone as I have iPhone 8?

Update: Just tested on an SE 3rd and iPhone 14 and the new FT is there and not in iPhone X/8 so it’s a phone based but the problem is why?

IOS 16 with the old Field Test design
 
 
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