Trying to Connect to HomePod Mini.

• HomePod uses the Wi-Fi network that your iOS or iPadOS device is connected to. Use your iOS or iPadOS device to forget the Wi-Fi network, then join the network again. 
• Personal Hotspots might work, but aren't recommended.
• If you're using an 802.1X Wi-Fi network, learn which networks are supported and how to connect to them. 
• HomePod mini and HomePod support captive portal Wi-Fi networks that require additional sign-in steps, for example those provided by hotels or dorms. Use your iPhone, iPad, or iPod touch to connect to the network, then follow the onscreen instructions for setup.

If you can't set up HomePod mini or HomePod - Apple Support