Ethernet isolator and power-line

[Paperman]

My server audio (nuc running roon rock and nas) is not in the same room of the audio system.
So I bought a power-line to connect the nuc/nas to the router (from the router to the devialet I use a normal ethernet cable). Unfortunately I have connected also sever domestic appliances on the same power network and l know that they put a lot of “dirty” on that...
According to your experience what do you think about an ethernet isolator to filter and improve the input signal?
Thank you.
Alberto