It would be iOS related (iOS 16.##), not phone model. Which my iPhone 13 Pro is capable of showing ‘Lockscreen Widgets’. However, my Nadia P90 UP 675’s don’t show the available widget in the lockscreen. This probably means that it only work for MFA hearing aids, which are mine are not (but are ‘Roger Direct’ & Bluetooth-enabled).
Non-rechargeable batteries don’t show battery levels in the My Phonak app.