It basically depends on the VEC group your VE is affiliated with. Some do things quite fast while others take the slow route. Several of the groups that do online testing (and once they go to in person testing will bring that technology along) have things where the testing is graded by the testing system (and independently verified by the 3 VEs that sign the 605) all required documents signed (electronically), collected, and saved for the testing session to be finished. Once everything is completed (and verified by the lead VE who electronically signs of on the session), it's packaged up and electronically filed with the VEC agency. That VEC will then verify that everything is there and correct and then file it electronically with the FCC. The FCC processes the batch and assuming that everything is good will quickly post the results into the ULS system and send out the emails to those that passed. Since the VEC accepts electronic filing of the session information, there's no delay depending on if they're in the office or working from home.
Other VECs take a different route. All paperwork must be assembled, checked, inventoried manually, packaged and then mailed (via USPS) to the VEC agency. Once the package arrives it is opened (perhaps after a 14 day quarantine period, but generally not) and the paperwork is manually checked and if everything looks good, the paperwork is manually entered into their system for an additional review. Once that further review is done and if things still look good, their system will electronically file the information with the FCC (now that the FCC requires applications be filed electronically, prior to that they would print out the documents and send them to the FCC via the USPS). At that point, things are fast with the FCC validating that all looks good and quickly post the results into the ULS and send out the emails to those that passed. With COVID protocols in place there may be additional delays while the mailed in packages are then forwarded to those working remotely from home so they can process the work and then forward it back for further processing (if process required).