Helix Fi 2 and Xbox Series X ethernet problems

new Helix Fi 2 router with 4 ethernet ports:

1 port to pc

1 port to Deco mesh unit

1 port to simple switch w 8 ports

1 port to Xbox Series X

the Xbox CAN get Helix wifi connection (300 MBPS)

the Xbox CAN get connection if plugged into one of the 8 ports on the switch but speed is slooooow (95 MBPS)

BUT

the Xbox CAN NOT get ethernet connection in ANY of the 4 helix ports directly

is there some configuration needed like PortForwarding on the router to make the ethernet connection work ?

I dont want to run it over wifi with the rest of the family using laptops and netflix and other wifi devices..

thank you/ merci