The Upper Tribunal in MM (section 117B(6) – EU citizen child) Iran [2020] UKUT 224 (IAC) held that EU child is required to have lived in the UK for 7 years to qualify for this rule.
https://documentcloud.adobe.com/link/review?uri=urn:aaid:scds:US:116b7123-015d-461e-b9e4-90a8903af720