This is transgender-related in that gender dysphoria is protected and gold-plated under clinical commissioning rules - local CCGs are not allowed to make their own value-for-money-based policies for transgender surgeries and must follow NHS England policies. Transgender surgeries are therefore protected from the 'postcode lottery'.
Meanwhile things affecting women such as breast asymmetry, breast reconstruction, etc are set on a local level and are as a result targets for money saving because they are ways for CCGs to save money.
The stated rationale for protecting GIDS is that it can be very expensive to treat so by taking it out of general expenditure it protects the individual NHS Trust from the burden. Obviously a specialist £20k breast reconstruction surgery is also very expensive, but this is not something they have thought to protect because well that only affects cancer patients and we've all been told that gender dysphoria is far more serious