@TP-Link  Ok when its in router mode its capped at 100mpbs, ive tested this via the Deco App as well as a cable plugged into the Deco directly. as soo as i make it AP mode then the correct line speed is working both on the deco app as well as speeds test from my phones and desktop pc.

Ive also tried turning UPNP off and have the same results.

Windows IP Configuration

   Host Name . . . . . . . . . . . . : DESKTOP-82VHR0T
   Primary Dns Suffix  . . . . . . . :
   Node Type . . . . . . . . . . . . : Hybrid
   IP Routing Enabled. . . . . . . . : No
   WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Ethernet:

   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Realtek Gaming 2.5GbE Family Controller
   Physical Address. . . . . . . . . : 18-C0-4D-3B-50-71
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes
   Link-local IPv6 Address . . . . . : fe80::b8ac:7f82:fd00:6179%8(Preferred)
   IPv4 Address. . . . . . . . . . . : 192.168.68.62(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.252.0
   Lease Obtained. . . . . . . . . . : Monday, 17 May 2021 11:07:10
   Lease Expires . . . . . . . . . . : Monday, 17 May 2021 13:07:10
   Default Gateway . . . . . . . . . : 192.168.68.1
   DHCP Server . . . . . . . . . . . : 192.168.68.1
   DHCPv6 IAID . . . . . . . . . . . : 286834765
   DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-27-61-B4-7A-18-C0-4D-3B-50-71
   DNS Servers . . . . . . . . . . . : 196.7.7.7
                                       196.7.8.9
                                       192.168.68.1
   NetBIOS over Tcpip. . . . . . . . : Enabled

Ethernet adapter Ethernet 2:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Kaspersky Security Data Adapter
   Physical Address. . . . . . . . . : 00-FF-57-E7-68-10
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes

@TP-Link Thank you for trying to help :)