My understanding is that they are still producing/mailing stuff out, just at a much lower capacity. It seems like they are starting to mail out EAD approvals around 6/19.
I also track this website just for the purpose of getting a better idea of their shipping progress (https://opttimeline.com). I understand the website is for OPT EAD card only, but I assumed that they are printing all the EAD cards at the same facility anyway.