Invitations amid Covid-19 pandemic

I rescheduled my November 7, 2020 wedding to May, 22, 2021, hoping the coronavirus pandemic situation would be better by then. Still planning on moving ahead with May and sent save the dates to a much smaller number of people hoping we could have everyone there. Of course, things change quickly and we may have to cut our guest count due to local restrictions, which is fine -- safety first. That said, as we plan on our invitations, we're debating whether to include a sort-of "COVID-19 insert" just saying things could change. Is that even necessary now? What have/are other brides doing? We plan to do digital RSVPs so we could include all of that online, of course, but should we give people a heads up who receive invitations that they may not be able to attend due to forces out of our control? Or is that kind of a given these days? Thanks in advance for any and all advice!