My MYLR is also stuck in Loveland probably due to the same problem since April 25th. Today, I got this text after pestering them since the 25th - "Thank you for your continued patience. This is the local team reaching out as we have received and inspected your vehicle. Upon inspection we did find a part that will be required to replace ahead of scheduling delivery. Since we are still waiting on the exact ETA for the replacement part. We will be reaching out to schedule your delivery and provide any additional updates as we have them. Please feel free to respond with any questions you may have."Just an FYI- Littleton has a bunch of cars (my M3 included) that they are holding until they receive and install the supply-constrained charge port ECUs. I don't have any info when that is, but if you know anything factual about the ECU status at Liittleton, Do Tell!
I waited for MYLR for more than 6 months now. I was mostly fine before getting VIN but this rolling 5-day delivery window has been difficult to endure.