After 31. December 2022, all drones between 250 grams and 25 kg, with no C-class label, will have to fly in subcategory A3.
Does your drone not have this marking? In that case, it is considered a "legacy"-class drone. All "legacy" drones that weigh between 250 grams and 25 kg must be operated in subcategory A3 from the year 2023. Drones that weigh less than 250 grams may still be operated in subcategory A1.
The regulations allow for "legacy" drones to be given C-marking, but this must be applied by the producer.