The modified gravity option is not ruled out, and it is a quite active field of research. This possibility is very alive (you can check this article that I wrote some time ago). I find it not as supported by data as standard cosmology, but it is on the other hand not excluded yet. And since anything not ruled out is an option... ;)
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Thank you that was exactly what I'm after 👍
You are welcome! Feel free to come back to me if you have any other question.