Well my dress up is limited to putting on a different t-shirt. (What's further down is irrelevant for zoom meetings) But it does help. I have a set of slightly more respectable work t-shirts and a very different set of home shirts. And it does change my mind set. And it is very nice to take it off at the end of the day.

Also my kids whom are stuck at home at the moment recognise the difference and "somewhat" tries to disturb me less if I got a work shirt on.