Playstation 5 using all my bandwidth

[#1]

Does anyone know how I can limit the bandwidth that my son's PS5 uses?

We had no problems with the PS4 but having upgraded to a PS5 when it is turned on we lose connection on all other devices.

We are on fibre with a speed of c.66Mbps

[#2]

I am having exactly the same problem. Any help would be appreciated.