You have dual band Wifi? And do both bands have the same SSID? Then try to switch off the 5ghz band or give it a different SSID temporarily. After Homey is connected you can set it back as it was.
When you use the search function you can find numerous topics about Wifi trouble: https://community.homey.app/search?q=wifi%20problem
The upper one gives a guide: Problems connecting your new Homey to your WiFi? Try this!
