Likely it’s LL04 Ow-20. A full synthetic as their oil temperatures run about 240F. 12k on an oil change is like their lifetime transmission fluid, smoke and mirrors. 4.8qts IIRC.
Just a FYI...technically LL-17FE could be considered the the 0w20 version of LL-04.
Going to look at low miles (5200) used '19 with 2.0L turbo. Salesman on phone said they provide 3 oil/filter changes using a blend, recommended change every 7500. He said up to 12K if you use full synthetic. I'd never go 12, but does 7500 sound ok with a blend?
BMW dealers use BMW-branded Shell GTL. I suppose a purist would consider it a "blend" because it's not 100 percent PAO but in reality this line of oil is of very high quality. The top end of these engines remain spotless on that interval. BMW reduced the mileage interval to 10k about 8 yrs ago however the minimum is 1 yr regardless of miles. I suspect it's possible that if you were all highway 12k miles might be the absolute max allowed.
A couple of things with BMW and oil changes.
#1 Do NOT under any circumstances reset the oil change interval if you perform a mid-interval oil change.
#2 The vehicle will not extend out the interval just because you changed the oil. Ex, Change oil with 7.5k miles on the odometer, the vehicle won't extend out to 17k miles on the odometer.
#3 BMW maintains a record of dealer oil changes. This record will determine your eligibility for the BMW extended warranty if you happen to choose to acquire one down the line. I don't know if this applies to third party warranties sold by the dealer.
#4 I've been told that the oil weight is determined by BMWNA. If they require the dealer to use the 0w20, then you will get the 0w20.