All of those working from home have found them modifying their behaviour to suit their new surroundings. That includes what to wear.
Various experts have advocated a dedicated work place to create some psychological boundaries between being at work and at home.
Another boundary that this bureau endorses for being psychologically at work is to dress for work. No, not a ballgown, but something that shows that you are work-ready and not falling into a downward spiral of despair.
By all means be comfortable, but it’s good to show work colleagues that you actually give a damn about something. What ever you would wear to the office on the casual end of the scale works best.