Extremely slow WiFi

I have two Cloud Managed WiFi 6 (WAX615PA) devices that I purchased to setup a mesh network.  I finally got round to setting up the first.  I'm having a two problems with it, but the one I need addressed first is the outrageously slow WiFi speeds.  (The other is not being able to add it to Insight)

These two APs will be replacing a AX1800 WiFi Router (RAX15) #.  The AX1800 WiFi Router (RAX15) #has been quite remarkable.  I get wonderful speeds and excellent coverage.  The Cloud Managed WiFi 6 (WAX615) #, on the other hand, has been nothing but a disappointment

Whereas I can get the full available throughput on the AX1800 WiFi Router (RAX15) #(300+ Mbps), I am lucky if I am able to get 20Mbps (usually get 11-15Mbps) on the Cloud Managed WiFi 6 (WAX615) #.  Initially, I thought it may have had something to do with the distance and weaker signal, when I brought the laptop right next to the Cloud Managed WiFi 6 (WAX615) #, the speeds remained unchanged.

I purchased the Cloud Managed WiFi 6 (WAX615) #devices for both mesh capability and the ability to have multiple VLANS/SSIDs.  At the moment, I've created 2 VLANs, but once this issue is resolved, I'll be adding a few more

Any and all help will be greatly appreciated.