As the headline of this news reported by the company says equalOcean Apple's foldable iPhone would arrive by 2023 with a 7,3 or 7,6-inch screen in addition to adding support for Apple Pencils. The latter personally I think it could come even earlier, since the support of the Apple Pencil on the iPhone is something that in theory does not have too much complication.
In this case, the news that is echoed by the MacRumors website indicates that this source does not have a history of Apple product leaks so this information could be totally false. Logically any page is capable of launching its predictions about the launch of the iPhone with a folding screen, then they need to get it right.
Few rumors about the screen size of this foldable iPhone
It is curious that the date on the possible launch year is the one that we have seen somewhere rumored but in terms of the size of the screen no one had given data about it until now. You have to take into account many factors to say how big this foldable iPhone could be and the most obvious is to draw a line between the largest iPhones and the smallest iPads. In this case these 7,3 or 7,6 agree a lot since they are right in the middle of both teams.
Another piece of information offered on this website is related to the Apple Pencil. In this case, the pencil already works in the iPad mini so it is almost certain that these iPhones end up supporting the Apple accessory. Undoubtedly the rumors about the folding iPhone are something that we have almost every week and Gurman warned that these models would arrive next year, we will see what finally happens.