After I became incontinent and was finally able to return to society and work (1996), there were a number of times that I had to share with extended family, friends, and acquaintances that I was incontinent out of need. Attends were the best disposable available back then (in the USA), but needed to be constantly changed because of the ease of press out. Diaper changes were a constant part of my schedule, as I needed to change 8+ times a day. I always carried a large bag that seemed to get heavier through the day, if I couldn't easily dispose of used diapers. When visiting someone overnight or longer, I needed to know where their trash was and explain why I was filling it up. After being informed, everyone seemed disinterested to be honest.
Since my wife went into hospice in 2010, I worked mostly from home and am now retired. I can stay holed up at home if I'm having a rough day. Disposable diapers are much better now, and I'm also now on a voiding schedule, so I'm dealing with minimal amount of diaper changes. The need to share with someone is just not there anymore, though I wouldn't hesitate sharing if the need arose.
And as I have said before, I have told family members and friends in the past that I deal with incontinence. Years later, I've needed to share with them again, because they have no recollection that I told them before. Everyone is too wrapped up in their own life to remember the details of your life. So unless your incontinence will affect them directly, there is no need to share, and chances are it will be quickly forgotten if you do share.