Knocking shock?

it is about the right front side of the karoq, it has 85000 km but all in a city where the streets are full of potholes and barriers. when I start in the morning, it knocks for the first 300 meters and then it quiets down. I suspect that the shock absorber is bad, there is a lack of oil or similar and then it knocks until the oil circulates through the shock absorber and the knocking stops. it's a little greasy on the piston and under the piston, not too much, once a month I wipe it with cloths. what do you think, should I replace the shock absorbers?