They can leak a little coolant in a cold environment but usually when warmer weather comes these cease. Assuming it's not a radiator leak maybe worth taking car for a run then nipping up all hose clips whilst engine warm.

Richard

2018 Roadster 3.7
1966 Land Rover S2a 88
2024 Royal Enfield Guerrilla 450
1945 Guzzi Airone