After configuring and rebooting the Netgear extender if you are not getting the SSID of your extender, then check if it is being broadcasted or not
Blinking Power LED:
If the firmware of your extender is corrupted or the extender is not getting the proper supply.
This is how you can troubleshoot the problem of SSID detection on your range extender. If you need further support, contact extender experts.