As a child I was pee shy.
I have always sat down to pee, so then I always used the cubicles rather than troughs.
A lot of the reason for this was to avoid anymore ridicule and harassment from the bullies at school.
When I had transitioned and I was doing street work, obviously after a few hours of being outside, often in cold temperatures, it was necessary to pee.
Disgusting as it might sound, basically the girls would pee anywhere available. Usually behind bushes, or in drives and entries. Normally about 4 of us used to go together. It was a very quick hitch up your skirt or dress, pull your knickers to one side, and crouch down, and let it go as quickly as possible. Normally 2 at a time would pee, and the other 2 look out for anyone coming past. It was then swap over, so the others would pee and then the other two look out.
As there really was no other option, I can assure you that it very quickly cured any pee shy that I previously had.!!!