What frequency (wifi band) are you connected to ?
A lot of factors come in to play regarding WiFi, from the WiFi hardware (reception/ booster) in both the router and in your case phone, to channel congestion (probably being the biggest impact) and overall distance between you and the router.
As shown in the pictures of my s21 fe our 2.4 ghz band is congested its heavily used in the surrounding area of my home, where as the 5ghz band I've managed to isolate channels that not many people are using, I would recommend using a WiFi analyser and manually select your channels as the auto function on most routers is pretty poor in reality.
With the speeds you mentioned though it should be more than enough for day to day activities
Best of luck