Here's an example of the entire planet as a PMTiles:

https://pmtiles.io/?url=https%3A%2F%2Fdata.source.coop%2Fpro...

This is zoom 0-15, or 1,431,655,765 addressed tiles. So it is designed for this scale - for a production internet site you can add a lambda, server or CDN as an additional layer for lower latency: https://docs.protomaps.com/deploy/