I understand that someone may have read it that way but that is not the case.
When you reflash the Librem 5, you are removing everything on the disk and reestablishing everything on the disk: kernel and everything else that is on the disk.
The instructions for doing that don’t need to come from Purism and, if the instructions do come from Purism, I doubt they will differ much from what has been documented in this forum or differ much from what I am trying to get updated in the official documentation.
What does have to come from Purism is information and instructions for updating the firmware on the modem. However indications are that you already have the latest modem firmware. So nothing to do there.
Or to look at it another way: You can’t change anything about the past. But investments should be made based on expectations about the future and, as all reputable investment advertising is at pains to tell you, past performance is no guarantee of future performance.