A good part of my exercise routine is walking (at a good pace) outside, so that hasn't changed. The only issue with this for me is that I am also using walking as a calming exercise so I have been having issues with taking days off!
I am also taking virtual pilates classes a couple of days a week and doing pilates or strength exercises on my own on other days. Is it enough? Maybe not, but it's something.
While I do miss the in person classes I normally take (pilates & TRX) I'm finding that the virtual classes help. It gives me connection with other people and the possibility of corrections from the instructor. It also gives me the incentive to focus for the duration of the class and to do exercises that I don't always think of on my own.