Anyone with a 2020/2021 plate that's seen anything surprising come up yet? I'm hoping the coolant one is just consumption and nothing more serious (its in for a service & MOT in 2 weeks)
I wouldn’t put a drop in coolant level down to consumption as cars don’t consume coolant.
New cars can leave the factory with air trapped in the cooling system that’s purged over time with a consequent drop in coolant level in the expansion tank. However, if that’s going to happen, it’ll normally be during the first few months of the car’s life (I had it happen in the first 3-4 of owning a previous brand new VW). A drop in coolant level some years down the line usually indicates a potential leak or - with VW - potential water pump / thermostat housing issues.
When the engine’s hot and the cooling system’s under pressure, can you smell coolant if you lift the bonnet? Are there any signs of coolant / dried up coolant deposits in the engine bay? Has the coolant level dropped suddenly or gradually over time?
I’d certainly keep an eye on the coolant level and if it drops again, that does suggest you may have a leak.