That being said, there are ways of training solo. In 2009, I demo'd a grappling dummy video that was, at times, criticized because there was no human partner---just a dummy. The whole notion behind a grappling dummy is much like a boxer/kickboxer training on punching bags, thai bags, speed bags, and any other device that allows full range striking. A grappling dummy allows for full range DRILLING.
During a global pandemic, your grappling does not necessarily have to be shut down while waiting this thing out. Get a grappling dummy---any will do. Continue training.