High-masking

Privilege works both ways – a high-masking autistic has the privilege of choosing whether or not to share their identity, while a low-masking autistic has the privilege of not having their identity doubted or questioned.

Source: wiktionary

'Rules are very important to my girl and she will always follow them, also she is a high-masking autistic and tends to shut down rather than meltdown, so she rarely gets in trouble.'

Source: wiktionary

My high-masking autistic personality, having achieved a semblance of “normalcy” by listening carefully to every word and every nuance, caught the hidden subtext.

Source: wiktionary