I do about half an hour a day, either just ‘for a walk’ or with a purpose, walking much of the way into town for shopping or for my DL swimming sessions.
IIRC one of the ‘one things’ recommended by Dr Michael Mosley for general health, was walking for even 15 minutes a day. Which seems like very little to many of us, but then some people hardly walk at all, except to and from the car.
IMO the ‘10,000 steps’ advice may have been counter productive, in that I suspect a good many people will have thought, ‘Well, I’m never going to manage that!’ so reason that it’s not worth bothering at all.