do you have a legal name and gender change? If you don't then you could continue HRT if it makes you happy, and present as male or androgynous when you want, you could even still have FFS and see if that helps you pass as female, and if it does present as female from then on, or as male when you want to, or just discontinue HRT and present male (FFS will make you look more feminine though), Some of the physical changes from HRT will revert back, but some of the changes like breast development will not, so instead of FFS you could have surgery to remove breast tissue. Or if you already legally changed your name and gender, then it is a fairly easy process to go back to court and have your name changed back to your birth name, and then make the rounds and change your name/gender at various places.
A lot of people in the trans community discourage detransition, and that can make some people feel trapped and very depressed, but it shouldn't be that way, because transition doesn't always work out for everyone, due to a lot of reasons, and not being able to pass is one of them; it doesn't mean that they are any less female or male; it's just something that is, and if detransition is what they need to do for any reason, then it is a viable option, and there should be no discouragement or shaming involved. So, if you feel that detransition is what you need to do, then by all means do so. Best wishes 🙂