My home network router is a Linksys AX1800. Which has a plethora of devices connected to it at once. I noticed last night when downloading a game that my speeds are noticabley very slow. Today I did see that I cannot see the extender listed under "online devices" or "clients" to the router and troubleshot the device myself and still no luck on increasing speeds. But can affirm that my Pixel 6, LG TV, and other devices are connected and operating as intended when connected to home network and extended network via TP Link.

My sole issue is I have my Xbox series X connected to the wifi extender and the speeds are crawling. The xbox is the furthest device away from the router. It has consistently been getting slower download speeds when connected to the extender and I cannot for the life of me figure out what the issue is. I performed a firmware update today, moved the extender closer to the Xbox and it continues to still have ~50mbps download and 10mbps upload.

Performed hard reset and still not able to see the extender as a listed online devces. Connectivity is available and all necessary lights are on. TV, phones and other things can connect to extended network - as it is available for also devices including Xbox. However the Xbox contiunes to have suppressed internet speeds. 

Any help is sincerely appreciated.