I think Toki Pona has tremendous potential as an international auxiliary language (IAL), being as simple as it is. But its creator and its community embrace it as an artlang, and seem to collectively disapprove of the idea of making it an IAL.

Which is silly. Esperanto is as it is (moderate amount of vocabulary, but with very simplified grammar) to make it as easy as possible to learn, to encourage its adoption as a lingua franca for speakers of all languages.

Toki Pona beats it hands down in that regard. You can have the entire lexicon and the basic grammar down in a few hours. You can be practiced to fluency within a few days to a couple of weeks.

In some ways, it's too simplistic... but a small official expansion (as few as maybe 50 words) would take care of those issues.

Alas, there's no momentum to do that to the language and sell it as an IAL at this time.

But if it keeps gaining popularity, maybe it can make that jump in the future.