You can use the Home app Make Personal Requests on HomePod
Use HomePod as an Intercom in the HomePod User Guide.
In the Home app, touch and hold the HomePod button, then do any of the following:
Add an alarm: Tap New Alarm, create the alarm, then tap Done.
Edit an alarm: Tap the alarm, change the time, then tap Done.
Turn alarms on or off: Tap the switch next to an alarm.
Delete an alarm: Tap the alarm, then tap Delete Alarm.
In the Home app, touch and hold the HomePod button.
Swipe up, then configure HomePod settings.
You can assign HomePod to a different room, add an automation, create a stereo pair with two HomePod speakers in the same room, rename HomePod, turn on accessibility features, and more.
You can extend access to HomePod throughout your home by enabling Siri on compatible HomeKit accessories such as thermostats, light switches, and more. “Hey Siri” can be enabled on these accessories so you can control them with your voice, get help with everyday questions or tasks, and play your favorite music and podcasts (beta).
See Set up a Siri-enabled accessory in the HomePod User Guide.