Most Catholic hospitals won't allow GRS, FFS, breast augmentation for a TS person, etc. The ones that do only do so because they were sued. They cite religious reasons. They own a hospital near here - it terrifies me that my wife or I could be taken there by an ambulance if either of us were hurt. I don't know if they would respect our marriage or treat her in a gender appropriate way.
The Vatican has said that post-op people committed a sin, can be forgiven, but basically should live as celebate. That's their more accepting policy that they recently adopted.
Personally I would stay far from that organization. You will be seen as someone who, according to Church teaching, has desecrated the body God gave you. They also believe that your gender matches the sex organs you were born with.
Maybe you could pass and not be questioned. But I personally wouldn't want to have to go to a church where I knew they don't approve of medical intervention that I needed, nor would I want to attend a church that thinks the ONLY legitimate way for me to live is to be celebate and single, and which is only this accepting after I confessed my sin and was remorseful and repentant for it.
I know not all Catholics think the same way as the Church leaders. But the official statements of the Church are VERY anti-trans.