and just to add, note that the scavenge side of the oil pump has a considerably greater flow (typically three times) than the pressure side, so equilibrium of oil levels is quickly returned after start up as oil is pumped back into tank.
Richard
2018 Roadster 3.7 1966 Land Rover S2a 88 2024 Royal Enfield Guerrilla 450 1945 Guzzi Airone