Maybe another way of asking this is, do you consider your lunch hour to be one of your 8 hours that day?
Or, more importantly, does your boss consider your lunch hour to be an hour worked?
Yes, all of you are retired, FIRE, work only 4 hours/week, crypto-rich, against the man, for the man, etc. -- we hear you -- but I'm curious how my fellow proles are doing it.
My "work day" is a combination of what my customer expects/allows, and what my employer expects/allows
When I've traveled onsite, my "day" starts when I leave the hotel, and ends when I leave the office - lunch has been 50:50 countable towards my billable time (always when customers are present, sometimes when not)
When I'm remote (which has been the case for 2.5y straight and counting), I err on the side of caution wrt billable hours, and sign-on between 8 & 9 and sign off 9-10h later most days
But the most important thing is that the work I need to get done is getting done (and that I don't unauthorizedly blow past 40 billable hours to a given customer in a week)