An update has been required to see the situation that has developed over the five years that have passed.
First, to understand the number, we will compare three words: flat earth, NASA, and Jesus.

Jesus 79, NASA 21, flat earth 1.
Given that there are 2.4 billion people in the world who believe in Jesus, we can calculate the others accordingly using this formula:
Believers in NASA = 21/79 × 2.4 billion = 638 million.
Believers in flat earth = 1/79 × 2.4 billion = 30 million.
We see that the number of people who believe in the flat earth is facing a serious decline.
Compared to the study we conducted five years ago:
Believers in Jesus have increased from 1.65 billion to 2.4 billion. This may actually be related to greater internet usage, which makes sense. We can see that it has increased somewhat.
Believers in NASA have risen from 637 million to 638 million and have remained almost the same.
Believers in the flat earth have declined from 301 million to 89 million, and this is a significant break. This situation needs to be addressed seriously.
If we look at it by region, we see that the highest number of YouTube searches for flat earth in the world are made in Yemen. Yemen is also one of the rare countries that challenges global powers, and this did not surprise us.

One of the countries that stands out in web searches is Australia, and this did not surprise us either.

Australia is also a country with a population that is seriously curious about NASA.

When we compare flat earth and NASA, Tasmania stands out from the rest of Australia, and flat-earth searches become more prominent there.

The ranking of the countries most engaged with flat-earth content worldwide has changed, and Afghanistan has taken the lead. I guess they’re experiencing an enlightenment after the change in their government. Haha.

Our biggest supporters being Afghanistan doesn’t sound pleasant, I’m aware.. In fact, it may even be irritating. But that’s how it is for you. It’s not the same from our perspective. Maybe the jihadists are right — who knows? Let’s not judge immediately.
Anyway. In light of these details, we can analyze what happened to the flat earth more clearly. Later.