I can see that you have a personal line drawn here. However, there really is a need for female people to have spaces away from male people even if they no longer have a penis.
For instance, removal of a penis does not change that male person's ability to cause serious injury to a female person. They still have a significantly higher grip strength, one that is likely to be higher than 90% of all female people's grip strength. And punch power is the same. And height remains undiminished.
There is also no evidence as yet that a male person at any stage of transition has a lower rate of committing a sex crime as any other male person in the UK. Indeed, a male called Sarah Baker called for all women who disagreed with Baker to be 'punched in the face'. So, while I understand this is your personal line, I say this so that perhaps you understand why others will not agree with you.
Also, female people use toilets for more than just 'peeing'. When my child was a baby, I regularly had to have the door jammed open by the pushchair while I dealt with flooding periods. I would have been horrified to have seen a male walk past. It was bad enough knowing the female people could see me, but at least I knew that some of them very likely had been in a similar situation.
Also I have had to clean my shirt and other clothes for numerous reasons, including breast milk explosions, or just a drink.
And of course female people are highly likely to reliably sex a male person. Even one with their cock and balls removed. Just by seeing them move and hearing their voice. Plus looking at their facial proportions as well as their skeletal proportions.
So, as others have pointed out, why does any female need to accept a male in their space? Where do you draw the line? Prisons? Shelters?
Again, I understand that you have stated your line in the sand, so this is just some reasons why I don't agree and I think others are not too dissimilar.