Almost a month ago, iOS 17 was launched and Apple finally allows interactive widgets on the home screen. In a nutshell, this means that actions can now be performed in widgets without having to open the corresponding app. This is exactly why Philips Hue removed widgets from the iPhone and iPad a few years ago and has not yet presented a new solution.
A few years ago, Apple completely overhauled the notification centre and thus also buried the widgets previously available there. With iOS 15, the widgets moved to the homescreen, but had a big problem there until now: they did not allow any interactions without opening the associated app. Since then, there has been no Philips Hue widget for iPhone and iPad.