Ping issues on Wifi but works fine on Ethernet

So I have got like a decently good internet where i live and it works perfectly fine for normal use. I play valorant on my PC but whenever i play on wifi, my ping fluctuates alot and is usually higher than when i play with ethernet connected. With Ethernet i get constant and better ping which doesnt fluctuate at all.
Does anyone have a fix for it? Cuz i cant continue on ethernet.