First of welcome!
I’m no expert, but in regard to the Librem 14, I believe they need to make sure all the “t’s are crossed and i’s are dotted” so to speak. Purism wants to make sure they ship a premium and well built computer, this means double checking each aspect and if something is a little off, fixing it and then seeing how that fix affects the final build.
I’m sure they will update us sometime soon regarding how all the polishing is going, but I’m right there with you in wanting to know what is being fixed up in preparation for shipment.