Motor oil – increased oil consumption

Hello, together! I would need your help ;( I bought my Crossland X a month ago (it had 115,069km). I had TÜV re-made. On 17.04.24 I made oil changes (115,105 km) , 3,5L 0W-20 Total Quartz Ineo Xtra First (PSA B71 2010) according to manufacturer’s specification. On 09.05.24 (with 115,668km) the car complains: correct oil level. Oil tail rod shows about 1/4! That means still 0.5L filled in. I looked under the car and saw no oil stains on the ground. Eb In this way I had it on a lifting platform and found no signs of oil or leaks. Exhaust gas looks “normal”. Timing belts have no cracks and also looks “normal” compared to pictures in the context of recall action. Driving behaviour: Mo – Fr a total of 30km daily, on weekends mostly short distance, average speed: 50 DATA: Crossland X, BJ 2018, 1.2 Turbo, gasoline, automatic. EXTRA INFOS: On 18.06 I have an appointment with the Opel because of recall action. Questions: 1 – Was ka nn the causes are? It is not normal to have to fill 0.5L every 2 weeks, right? 2 – Have you seen such a thing? 3 – Should I talk about the oil consumption at the appointment or wait for the FOH to check everything? I would like to thank you very much!