We don't know for sure if someone has already won the Rolex, Iphone or Amazon giftcards prizes, but in positive case, it would be a good propaganda for the platform if the winners came here on this forum to share their winnings with the community, just like they do when hiting the 20$ prize on the free hourly faucet to receive an extra reward. If freebitco.in gave, let's say, an extra 10$ or 20$ for Wheel's jackpot winners I'm sure they would come here at bitcointalk forum to tell us about their winnings. However, I also have the impression nobody has won those prizes yet.
I also don't think there are any users who have been lucky enough to win a Rolex or iPhone from Wheel of Fortune yet. In principle, this is not surprising because even such prizes as 3,1k sats/RP or 1,5,50 golden tickets are rarely won. I guess once a user is lucky enough to win a prize like a Rolex, freebitcoin will most likely announce it themselves because it's a very rare event.
However, it could be that the person who won the prize is not a member of the forum so he will inform here that he managed to win a Rolex or iPhone prize from Wheel of Fortune, maybe if freebitcoin carries out additional promotions like it has been doing for a long time where those who managed to get $20 or $200 from the free roll and post it in the thread that has been provided by freebitcoin will get extra bonuses, this is also done for those who get big prizes from the wheel of fortune, someone will post it so that we know that this prize has been won by a user of this casino, and I'm pretty sure someone has already won the prize because if we haven't seen anyone claim to have won it doesn't mean no one has succeeded.