@EtzelCalderon 

Generally, if it shows your router firmware is up-to-date on the router web GUI, that means you are already on the latest official version. May I know the correct model of your router? Is it Archer AX21 or AX20 or AX1800? You can find the correct model on the router bottom label, which starts with Model No. Archer AXxxx.

After determining the correct model number, please check again if you are on the latest official firmware, which can be found on the local website, you can search for the Archer AX model, then go to the Support - Firmware page, the first one would be the latest.

There is no beta firmware for trial to test the speed limit feature recently added to the Archer AX73 described here.

@EtzelCalderon 

Got it, so your model is Archer AX21 and its hardware version is V1.20. You can check it here and your firmware version is the latest official version.

BTW, we only have Archer AX73 and AX4400 support the feature to set a bandwidth limit for the guest network, which has been introduced below:

Speed Limit on Wi-Fi Routers

@EtzelCalderon 

Sorry that we don't have any specific details that I can share around if Bandwidth Control or the so-called Speed Limit feature can come to all the home routers, or when it might, I'll make sure to log this feature request and pass it along to the team.