Decades ago I used unisex toilets without thinking about this in a few places, one bar, one event place, and another service station I think iirc. It was a none issue at the time and I felt fine about it. In hindsight I wasn’t drunk, I was with trusted friends and it was early in the day/evening. At the very least the ones from the bar scare me looking back, if I was on my own among drunken men I didn’t know I’d be terrified. The service station had an attendant I think (it was a school bus trip of some kind, I guess it might have been a teacher or volunteer I didn’t know well but I think it was an attendant).
Since having children I’ve used unisex changing rooms at swimming plenty, the kind with separate changing cubicles that are open at the top/bottom and one large play place we go to has unisex toilets. These are brilliant imo, they are like any other toilets I guess but there’s no wall separating the toilets from the long walk way they are part of, they are set fairly far back, with the row of sinks first then the toilet cubicles further back again. These are super clean, because of course they would stink the place up otherwise due to being open. I have daughters with asc and other disabilities. They are in no way able to go into female toilets on their own yet, despite being ‘old enough’, and there’s no way they would ever enter the men’s toilets without huge melt downs. Techno they are entitled to use disabled accessible toilets but they are ridged that they use the girls and can’t cope with accessing disabled access unless it’s the only toilet in a tiny cafe iykwim. So basically it means I have to be with them, or if their dad takes them out they can’t be out for long or need to identify single use toilets the girls will be willing to use. The unisex ones at this play place are so open it feels safe to use (the entry desk is easily in ear shot) and they are fine with dads or boys using them as they see the other mums and girls are. I know this mostly definitely isn’t applicable to many places, and I think women’s safety comes first, but my girls needing me to be with them/be their primary carer when out on longer trips reinforces traditional sex role stereotypes, so the fact their dad can be their carer while I get a break and we don’t need to worry about toilets at this place is a relief. When I’ve spoken to friends about this they’ve often said the same- their children don’t have disabilities but they find that the usual 8 yr old expectation as the age when kids must go off to single sex toilets on their own concerning and the question of how it becomes limiting to plan around the same sex parent (if there is one) needing to be with the kid to access toilets is at best a pita. Obviously this isn’t anywhere near as important as women and girls being able to be safe, so if it was all one way or the other then I’d think single sex facilities comes first- even open clean safe unisex facilities are not appropriate for schools/work places/hospitals/bars, where women or girls maybe at greater risk of attack or being shamed for having female bodies with female needs. But being stuck sending girls out with mum and boys out with dad (if he’s around) for the few yrs in the middle where they aren’t independent enough to access single sex facilities but are too old to go to the ones with the opposite sex parent isn’t ideal either and if it’s possible and appropriate in some circumstances, like this play place, then I think that’s a plus point. I remember getting dragged into the male toilets with my dad when I was swimming with him on a contact visit and being deeply uncomfortable at seeing men use urinals, but I was tiny and couldn’t have been left on my own then and contact matters (even with a shitty dad like mine) and while it’s just one of those things parents need to plan round it’s not a bad thing if it’s possible to make this easier where is safe to do so. Baby change facilities are often either only in female toilets (or solely in disabled accessible ones) which again reinforces the same sex role stereotype that mums should do the care/changing of babies. I’ve changed my fair share of babies on my knee etc so I know it doesn’t make life impossible for dads to take out their babies, but it does reinforce that it’s the social expectation for women to have this role and wouldn’t be a bad thing to challenge that where possible, providing it doesn’t compromise women’s safety.