@MontStMichel
So, because you haven't come across it, it doesn't exist?
I've been to multiple places where the accessible toilets are within either the male or female facility.
The last one that I had to use did not fit my wheelchair, I had to go in through the main door, leave my chair blocking the accessible toilet door open and use the loo INSIDE the mens toilets, I could see people peeing at the urinal, people passing by outside the toilets could see me pissing/men coming out of the mens could see me pissing.
The same arrangement was also in the ladies, the accessible cubicle in the entrance to the ladies but inside the main door.. however I couldn't even get through that main door there, and in any case the hand rail was on the wrong side for me so I couldn't have used that toilet.
It is not at all uncommon in buildings where the accessible toilet is a 'retro fit' and has to be within either male or female toilets, that the door into the toilets is not wide enough so you can't get near the accessible one.
One reason is that often providing these facilities IS a tick box exercise and there are no real penalities to businesses or venues if the facility they provide is not actually suitable, accessible, useable.
Another common one is toilets used as storage - more times than I can count, I have found the accessible toilet in a restaurant is used to store extra chairs, high chairs, kegs, cleaning materials...
I am sure if you only go to nice new shiny shopping malls, it's easy to think that disabled accessible toilet facilities are universally provided AND actually meet our needs, but the truth is we are still a VERY long way from that happening.