2022 Ssangyong Tivoli if i leave my tivoli ultimate in my garage for more than two days the battery is flat.

Any modern car battery , on any make should be able to hold a charge for a lot more than 2 days when left unused provided it is fully charged and nothing draining the electrics ,

My dad has got the same problem and the answer from the dealer was the same (not the same person though, as we live in the Czech republic). He's had the car for 2 years and the problem reocurrs every now and then. So he got used to recharging the battery often, but this way it might get dead soon we are afraid.

I found this information for a Hyuandai SantaFe and think it might be relevant, as my dad keeps the key in the garage:

It is possible that the key fob being too close to the car is causing one of the computers or modules to stay awake. This can run down the battery. A similar thing happens to C6 Corvettes if the FOB is too close to the car. The module stays awake and discharges the battery over a couple of days. To test this put the fob further away from the vehicle or store it in a metal kitchen cook pot with a metal lid on it. Putting the FOB in a metal pot with a metal lid will keep it from communicating with the vehicle.

That is a known possible cause with a most makes of cars nowadays . Modern technologies !!!!!!