Don't you have indicators? In Spain the buttons (which BTW are increasingly uncommon, cars lost the battle) have two large indicators, lit depending on the state:
Some pedestrian crossing buttons play different audible beats so blind people know when they can cross. Famously the beat of one in Sydney was sampled for a Billie Eilish song (https://www.youtube.com/watch?v=I-zeJRjP6xA skip to around 4:00 mins).
However others have no indicator or sound. To make things even more confusing is the pedestrian crossings can also be programmed to happen automatically at peak times with no button press, but absolutely need a button press outside of peak hour.
No indicators on the unit itself, but the opposite side normally only has the red man light illuminated if you've pressed it doesn't it, and no light at all if it needs to be pressed and hasn't?
At least that's the way it is here in NZ, and when I've been in Sydney, Melbourne and Brisbane I haven't obviously noticed a general difference to here in NZ (there are particular crossings that are sometimes a bit different, i.e. you never need to press, but)...
That big button, incidentally, is quite a nice piece of industrial engineering. It uses a hall effect sensor and magnets to maximise the lifetime of the button.
In Finland there is just a light above button in the box. It will light up when it is activated. Or actually when cycle is activated so also for other side. Decent enough UI for non blind, with blind I think there is sound in some cases.
However others have no indicator or sound. To make things even more confusing is the pedestrian crossings can also be programmed to happen automatically at peak times with no button press, but absolutely need a button press outside of peak hour.