This post is suggesting just such a mechanism:
> The second half of this post will outline the parent theory – three stage cosmological natural selection – which successfully predicted these extremely early supermassive black holes, and their jets, plus the associated rapid early galaxy formation, in advance of the first James Webb Space Telescope data.
I want to correct a misunderstanding I had when reading the article the first time:
The mechanism suggested is Direct Collapse Black Hole formation, not the "three stage cosmological natural selection" model I quoted.