Techincally, you’re doing ‘live work’ simply taking the covers off an electrical panel. And while the morbidity/mortality stats are most likely low on this one particular task, there are some steps that could be taken to enhance the safety of doing so
First and foremost would be to de energize, which in our American system means the main , or remote main for an MLO
The Canadians isolate their service entrance within a panel to it’s own compartment btw, our manufacturers simply don’t have our safety in mind as they do.
There are many overstuffed panels out there that are problematic , their conductors press up against the screws holding the covers, some even have a latching mechanism where they’ll get caught.
Good luck and play safe out there