I'm not sure what kind of help you can get on TSR for this. I can only confirm that everyone is struggling to get work experience in most fields at the moment, with the exception of hospital volunteering for healthcare professions. And even that is scarce. As you've said, the pandemic means a lot of people are working from home, and those who are back in office are under strict rules and regulations. Chances of a company accomodating work experience, over their own staff returning, are very low. I know architecture students are facing the same thing at Uni where no companies seem to be taking voluntary work at the moment.
Universities know this, and a lot of them have eased/omitted work experience accordingly. So if you're worried about that, you shouldn't be. The most you can do is email/call relevant local businesses and ask to be put on hold for whenever volunteers are feasible for them.