Taking our Solar System as an example, most gas giants formed relatively close by (a few AU) and drifted away to reasons I don't know, from an explanation I recall reading. Simply orbiting a few AU away leaves Jupiter very cold. From what I've read, simply observing the bodies orbiting the Sun a few 40 or so AU away reveals they are very sparse in number, and small dwarf planets at best.
This too, is for a fairly large sun like ours, which I assume would have had a much larger protoplanetary disc compared to your average red dwarf star, which COCONUTS-2a is.
How would a planet, that too a gas giant of all things, find itself orbiting a very small star which would have a weaker gravitational pull compared to a Sun-like star like ours at a ludicrous distance of 6000 AU?
Would the gravitational pull not be very weak there for a star like COCONUTS-2a? Not to mention, how would a planet like 2b make it there? Drifting a few AU away is understandable and probable, but assuming it formed an AU at best from 2a, how would it end up at 6000 AU?