Currently only the main page of the export is pre-rendered (and correspondingly indexed by Google. to use Logseq docs as an example: https://www.google.com/search?q=site%253Ahttps%253A%252F%252Fdocs.logseq.com)

The fact that there is at least one page pre-rendered is exciting because it implies that infrastructure for it is already there.
It'd be great if there were an option to pre-render all the pages (optionally - only pages tagged with a particular tag)

With many pages actual pre-rendering may take some time but:

• After initial build - it can be done incrementally only for changed pages, which should take minimal time
• You can make it opt-in - I imagine people who value SEO/searchability of the website would be happy to take increase build time as a tradeoff