Yes, I keep separate trays for the adult beetles with a screened bottom so eggs fall into another tray beneath. When those hatch, I replace the tray under the beetles.
Those grow out and I then transfer morphed pupae (adults) back into the adult beetle tray.
Here's something I discovered by accident a couple years ago. If I use mill run wheat flour instead of bran, which I now do in every other tray under the adult beetles, the result is larvae that are twice the size of ordinary larvae. I rotate using bran in every other tray because the larvae do not pupate on the mill run because there are natural hormones in it that cause continued growth. The max has been about an inch and a half long and the larvae continue to grow for up to six months, twice as long as normal. I bet they'd sell for more than eight cents each.