Remember that in 2020, Democrats greatly reduced in-person campaigning due to the pandemic while Republicans mostly maintained their usual levels of in-person campaigning, and that was an important factor in Republicans overperforming/Democrats underperforming polls (for example, 538's final NPV polling average as of Election Day was D+8.4, while the actual NPV result was D+4.5). If this logic were applied to a hypothetically imprisoned Trump, it should be obvious which side would benefit more.
Somehow a majority of the media and a sizeable number of posters here are essentially spinning almost everything as negative for Biden and positive for Trump. So Trump is now supposed to benefit from being off the trail while Biden has criticzed for it in 2020 during a pandemic (while Trump is on trial, which would have finished any candidate before).
Trump destroys himself when he's trying to campaign seriously, Biden saves himself.