Impossible to connect two console rt3200 belkin

hello everyone I have a ps5 and my son a ps4

and I managed to install upnp on the belkin rt3200 I have nat open in my games on ps5 but when I plug the ps4 into the router it is not not even recognized and the console

write please connect a lan cable I had to connect the ps4 to the modem router isp for it to work, any idea?
i am on 22.03 rc1 thank you