This test from djozz proves that it’s possible.
The 4000K 219B-V1 R9050 does 470lm at 2A (the 5000K variant in the light should be the same or brighter). 12 of them 5640 led lm. After you subtract the usual transmission losses you get around 4600 otf lumen. They state 4400. Seems realistic.
This is much dimmer than some of the other M43 variants, some do 7000-8000lm.