1.5 billion cell phones were sold in 2018. This represents 20% of the world population, assuming a negligible number of people buy two phones in the same calendar year.

Between 1.4 and 1.5 billion cell phones were sold in 2019, 2020, 2021, and 2022 (projected), representing roughly another 6 billion cell phones. That is, there is roughly one cell phone per person in the world "created after 2017."

Obviously, a significant number of people bought more than one cell phone in that time period; but, offsetting that, the average cellphone is sold more than once due to the used market. While it's hard to project this to actual estimate saturation of cell phones "created after 2017", it's very hard to imagine a case that the 6 billion phones from 2019 on don't represent at least another 10% of the population.

There is also advanced hardware besides cell phones.

Less than 30% of the world population owning hardware created after 2017 doesn't pass the sniff test.