Having problems with HomePod Mini dropping wifi connection with ASUS AiMesh? My experience:
When I had my 7 HomePod minis running on my AiMesh setup in my home, I was very frustrated with an AirPlay connection dropping hourly, or one side of a pair of minis dropping very frequently. I had two ASUS AC86Us and one AC68U as a router and two nodes, with Ethernet back hauling fron the two nodes.. My house isn’t that big, but it is old, a 3 story built in 1928, with lath and plaster walls and other barriers.
All we wanted was to reliably AirPlay music from our iPhones or iPads as my wife and I moved from room to room. We don’t use Siri at all for HomePod functions (another story).
As a last resort before giving up on HomePods, I purchased a pair of ASUS ZenWiFi AX routers, advertised to support 5000+ square feet of space, to see if that made a difference. If not, I was going to return them. The two AX are in an ASUS Router and Node AiMesh configuration with an Ethernet backhaul connection from the node.
Result: all HomePod mini connection problems disappeared! Wow! The two ZenWiFi units flood the house, better than the three older units. There is no problem with the mesh configuration: a combination of increased wifi signal strength, but also installing the very latest ASUS AX router Firmware version: 3.0.0.4.386.45934 (Nov-Dec, 2021). That version supports a second guest wifi network, in addition to existing 5ghz and 2.4ghz bands for 2.4ghz IOT devices if you need them. My Nest Protect smoke alarms would not connect if 2.4ghz and 5ghz shared the same SSID (smart connect mode).
My hypothesis is that Apple HomePod minis are extremely sensitive or unforgiving of any Wi-Fi problems due to their design or lack of effective Wi-Fi error recovery, so AirPlay just quits.
Your environment and experience may differ.