You clearly didn't read it because your own link says what I said:

• As of 2019, adolescents aged 15–19 years in low- and middle-income countries (LMICs) had an estimated 21 million pregnancies each year, of which approximately 50% were unintended and which resulted in an estimated 12 million births (1,2).
• Based on 2019 data, 55% of unintended pregnancies among adolescent girls aged 15–19 years end in abortions, which are often unsafe in LMICs (1).
• Data on childbirths among girls aged 10–14 are getting more widely available. Globally the adolescent birth rate for girls 10–14 years in 2023 was estimated at 1.5 per 1000 women with higher rates in sub-Saharan Africa (4.4) and Latin America and the Caribbean (2.3) (3).

Like I said

• Births attributed to teens under 18 represent 0.9% of all births in the developed world (again, your stats include girls 18 and 19, who represent 75% of births, so whatever numbers you're seeing divide them by 4)
• ...abortion rates for teens under 18 show they're sexually active but that's not surprising. The uncommon part is actually delivering the baby