Hello, I have a TP-Link AX3000 WiFi 6 Router (Archer AX55) and looking I get an extender for it. There appears to be two made for it. Could someone tell me the difference between the: TP-Link AX3000...

Just got a TP-Link AX3000 (Archer A55). I have 1 GBps internet, but can only get ~550 Mbps to my iPhone 13 Pro Max (which has 802.11ax). It gets ~980 Mbps through internet, but almost half that...