Not all disabilities are visible. My husband had a stroke, and requires a wheelchair. His disabilities are obvious to the casual observer. I had a lung removed. I can’t walk far. Sometimes I use a walker. Sometimes I use a power scooter. In most situations, it’s too difficult to get those things in and out of the vehicle, so I just try to limit the distance I have to walk. I don’t look disabled.
I know what you mean. Between hubby and me he has had 2 hips replaced, a knee and just started chemo so he is weak. He just got a permanent handicap sticker. I’ve had one knee replaced and am in pretty good shape but too many errands and stops and I am pooped for the rest of the day. I won’t use his sticker when I go out but his has come in handy already for him. Other than walking slow he does not look disabled.