2022 Yaris Cross should be able to travel to the moon and back with no problems given low mileage such as yours. While it's true that cars don't appreciate sitting around not being used, 1000km in four months still suggests it gets a workout now and then and hasn't sat around for that full period of time. Don't forget that cars often sit around for months at dealerships waiting to be sold. That said, demand for the Yaris Cross recently has ruled out that possibility. Basically, your car should still be well and truly match-fit provided it has had all its maintenance and checks carried out. Don't forget to check the tyre pressures, top up the windscreen fluid and enjoy the journey. Extended road trips are precisely what cars are for. And modern cars, even smaller ones like the Yaris, are better at this than their forebears ever were, especially in terms of comfort, safety and fuel efficiency.