Hey there, tlcnz,
Thanks so much for using Apple Support Communities.
We want to share some resources below which we think will help you troubleshoot this issue you're encountering with your Home app and your Phillips Hue accessories. You can click through those links below for more information:
If your HomeKit or Matter accessory isn't responding in the Home app - Apple Support
Add a smart home accessory to the Home app - Apple Support
Control your home with Siri - Apple Support
If the issue continues to occur after checking out those resources, we want to recommend that you contact Phillips directly to see if they may have som additional information on how to best utilize their hardware with the Home app. It looks like you can reach Phillips right here: Phillips Hue Support
We hope that this information is helpful.
Have a great day!