I've read studies that show human population peaking around 2100 and slowly lessening until it finds a happy medium. This is due to increased access to birth control in developing nations as well as people simply having less children because automation on the farm replaces the need to have several workers (the kids) around to help with the harvest, etc.
Link to article: https://www.pewresearch.org/fact-tank/2019/06/17/worlds-popu...