Different places have different ways of doing things. One of the recent online courses I saw was step by step, and each step opened as soon as you finished the first.

Once everything is online - the assignments, the test, the proctors watching you take the test, the grading for the test being automatic - it's no longer as important for those places to schedule everything exactly. It's also incredibly different in the experience, because the chance of an actual professor teaching is incredibly slim. They have you just reading the textbook and being referred to youtube videos.

Did it once back in the day, I just asked the teacher if it was ok to send everything at once, but that was in paper form though so they just sent everything in a package

Yeah it was a fully online thing, they also had like a forum where you could talk to the other people taking the course but they just gave everything on day one so you could do it at the pace you wanted.

It was at the University of Umeå https://www.umu.se