What is the best hosting provider with global availability?

So, I have been with a lot of hosts over the past 6 years. I am currently hosted on a cloud.

The only problem is that people close to my data center have good load times because of the low TTFB. But in other places far away from my data center, TTFB is quite high, which makes the loading time unfortunate.

Now, I know that CDN should help here to load the content of the site from the nearest server. But the problem is that CDN only caches the static content of a site such as CSS, JS and images. While dynamic PHP is still loaded from your current root server.

So, is there a hosting provider that allows you to choose multiple data centers at once?

If this is not possible, is there a CDN provider serving the entire site, including the dynamic part?

My goal is to have the lowest TTFB in the world. If there is another suggestion, thank you for letting me know