When I think of different industries I imagine the majority as being factories, shops, leisure etc where wfm is not an option
Lots of people who work in factories, retail, leisure industry plus NHS and other medical services etc are still office based some or all of the time. They might have to do some 'shop floor' work but still have an office and will currently be working at home some or all of the time. These places all have health and safety teams, finance, business continuity and emergency planning, environment, engineering and design, product development, media and PR, sales plus probably others, all office based to a degree so possible to do at home.
I visit a very wide range of businesses in my role and, while some people are more hands on, plenty of others have a more desk based role. I do know some clients have currently closed their premises, while others are busier than ever, but those who are still operating will be working at home while they can, but might be going to their workplace occasionally, but only when they need to be there in person, but they can do office work and participate in meetings remotely.