is anyone who works fro commercial happy to help and share their covid specific RAMs?
have been asked to provide for one of our big clients
I have just added that at this time we are unable to do inside work due to Covid 19 restrictions not one job has questioned it .
some of these are internal cleans 
If they are asking you back then I would talk to each customer and ask them what they have implemented. If their health and safety insist that everyone wear a mask indoors and you can't breath through one or your glasses fog up then this becomes an issue.
However, the next business might work differently. As each business should have consulted their staff and agreed a procedure to handle Covid in their work place acceptable to them, you would have to abide by their procedures in their property.
If you can't compromise your procedures to suit them, then its probably a no go situation. We've done an internal clean since shutdown on a Saturday when only the boss was in. He left us to it.
We do another external clean once a month and did chosen internals every 3 months. Our internals have been cancelled and their cleaner has been told its now her job. They don't want too many Tom, Dick and Harrys in the house while this virus is about. I'm guessing we will end up doing the internals windows over the indoor swimming pool at a later date as their cleaner won't be able to reach them.
We haven't been asked back to clean the internals windows of our local gym yet. I'm not sure how it would work as we can't do it out of hours.