Townhouses and duplexes often have two floors and longer layouts, so a stronger router or a 2-pack mesh Wi-Fi system is recommended.
Look for routers with AX3000 to AX6000 Wi-Fi 6 capability to ensure good coverage on both levels.
Recommended options:
TP-Link AX3000 2 pack or 3 pack
Tip: Place one mesh node near your fiber box and the second node on the other floor or at the far end of the home.