outside (someone's) purview

Translations
вне (чьей-то) компетенции
The technical details are outside my purview.
Технические детали находятся вне моей компетенции.
Definitions
Referring to matters or issues that are beyond someone's area of responsibility, authority, or knowledge.
Words
purview

noun
компетенция
outside

adverb
снаружи