SDG #4 is to “Ensure inclusive and equitable quality education and promote lifelong learning opportunities for all.”
Within SDG #4 are 10 targets, of which we here focus on Target 4.5:
By 2030, eliminate gender disparities in education and ensure equal access to all levels of education and vocational training for the vulnerable, including persons with disabilities, indigenous peoples and children in vulnerable situations
Target 4.5 has one indicator:
Indicator 4.5.1: Parity indices (female/male, rural/urban, bottom/top wealth quintile and others such as disability status, indigenous peoples and conflict-affected, as data become available) for all education indicators on this list that can be disaggregated
Whilst for this indicator, there isn’t one global parity index for gender equality, disability, and indigenous people. We do have some data for individual countries.
Those with a 2021 gender parity for primary completion lower than 0.8, meaning less 8 girls for every 10 boys, were Yemen, Somalia, and Afghanistan. The latter two had parities closer to 7 girls for every boy.
What about secondary completion? A half-dozen other countries in sub-Saharan Africa with 2021 data had parity rates across the sexes below 7 girls for every 10 boys. The lowest secondary completion gender parities were in Chad and Somalia, where 0.35 girls completed secondary per boy.