I have been communicating with another forum member via PM, trying to help him out in a small way with some contacts who have helped me out with issues on my machines. He can discuss more publically if he wants to, but the gist is this...
Apparently, Apple has had his machine for 3 weeks. He sent it to them for repeated and continued T2 crashes as well as keyboard issues. It took them nearly 2 weeks to even begin the "repair" and after week 3 told him that they were unable to duplicate the issue he was having with 3 keys. He informed them that he sent it in primarily for the T2 issues and that the keyboard was an addition to the primary issue. But it appears they have done nothing to address either issue in those 3 weeks.
He mentioned to them that he understood that the issue with the keyboard would not always be reproducible, but that doesn't mean it doesn't exist. He asked, that since they already have a keyboard program in place for the 2016/17 models and are aware of issues with the 2018 models, why they wouldn't just go ahead and repair/replace the keyboard while they had it rather than have it be sent back in when it fails again. Apparently, the response was that if they were to do that, people would take advantage of that repair. I am not sure I understand Apple's logic there. Why would anyone with a keyboard that is working perfectly "take advantage" of that kind of repair and send in their laptop for 3 weeks only to risk a keyboard that might fail rather than keeping their machine with a good keyboard? <smdh>
So apparently the machine is now finally on the way back, but no evidence they did anything to address the keyboard issue or the T2 issues. The notes said they could not replicate the keyboard issue, no notes addressing the T2 issue.
When he asked specifically what was done the response was "we don't provide that as most customers don't want to / need to know as it just leads to confusion."
My guess is that it is being returned with nothing done. Maybe a shine and a keyboard blowout? Hopefully, that isn't the case. ┐( ͡° ʖ̯ ͡°)┌
TLDR: It can be worse than 11 days apparently.