No. As the report itself says, stabilizing the population (or slightly shrinking it) will help fight climate change, but that can be done very easily without "population control".

"make family-planning services available to all people, remove barriers to their access and achieve full gender equity, including primary and secondary education as a global norm for all, especially girls and young women [1]

Which makes sense! Rather than some sort of authoritarian China-esque policy of limiting children, just spread access to goods (like education, contraception and abortion) which allow people to control how many children they have.

[1] https://science.sciencemag.org/content/361/6403/650