Apple's Airport Extreme doesn't have DDNS support built in so it can't update the service itself. But it also doesn't prevent any other client from talking to the DDNS service and updating the records to point to the Airport. You don't need to be on the router to get your public IP address;
Jun 17, 2019 How To Change IP Address on Airport Extreme | KeepTheTech Jun 12, 2016 How to Configure a Static DHCP Reservation with Airport May 23, 2012 Setting static IP addresses within Airport Utility Aug 08, 2017
With the latter option you’ll need to choose Manually from the Configure IPv4 menu and assign a specific address within the range you specified in the AirPort Admin Utility — 10.0.1.24, for
* Update, it working on the Apple Airport Extreme could be because the Ryobi GDO only runs 2.4 Ghz and the Google Mesh was so close to the GDO it forced the GDO to use 5 Ghz Wi-Fi (dumbly) and Google Wi-Fi has no way to hard set 2.4 Ghz on any specific Wi-Fi device. I go out for coffee every morning. All of the venues I visit have WiFi Access Points. I have trouble with only one. At that one place both my iPhone and iPad always get a self-assigned IP address. Other customers, including those using Apple devices, seem to have no trouble at all. I have tried This feature allows you to restart the unit, track the IP address and usage rates of different units, and enable or disable certain features. You can extend the local range of Wi-Fi coverage when you use several Apple AirPort Express base stations as a series of signal amplifiers. APPLE AIRPORT EXTREME BASE STATION 3rd GEN WIRELESS N ROUTER A1301, in excellent condition.. it was used only for 2 months.. and then i kept it as reserve/back up Base station.. Working 100% asking $ 60.00 or best offer.
* Update, it working on the Apple Airport Extreme could be because the Ryobi GDO only runs 2.4 Ghz and the Google Mesh was so close to the GDO it forced the GDO to use 5 Ghz Wi-Fi (dumbly) and Google Wi-Fi has no way to hard set 2.4 Ghz on any specific Wi-Fi device.
router address for Airport Extreme - Apple Community Jul 23, 2010 How to reset your AirPort base station - Apple Support Jun 17, 2019