Homey V5 (Discussion about v5 before it was released to stable)

I’m still on 4.2.0, but when I open the P1 smartmeter device, I get the notification that the device maybe will not be longer supported in the future.

The app is: https://homey.app/nl-nl/app/com.p1.dsmr/P1-DSMRv4-Board-Lezer/
Which according the developer page is on SDKv2.
Also it’s not listed in the list of non-supported apps for V5.0.0.

So any idea why I get this notification? Or nothing to do with V5.0.0?