It will be a while before they get better images downlinked. The radio link is unbelievably slow by modern internet standards[0]. Note that the faster 2 Mbps link is only available when one of the orbiters is overhead (4-6 times/martian day[1]). They also have a lot of work to do checking out the rover systems making sure everything is healthy, etc.
[0] https://mars.nasa.gov/mars2020/spacecraft/rover/communicatio...