He quotes Epíkouros as writing "...that it is possible even for many eternal and immortal gods to exist"
"Possible" does not remotely approach probable, or likely, or certainly. To me, that word is similar to saying, "I don't know, maybe, maybe not, and it doesn't matter to me one way or the other."
This general topic of who, or what gods may exist and what they do seems pretty vaguely written, and perhaps intentionally. For example, in De Rerum Natura, Lucretius begins by asking Venus to help him out as he writes the poem. Another example might be the one raised briefly in earlier posts here, relating to matter and void. If there is only matter and void in his world view, how can transcendent gods even possibly exist if they are not flesh and blood? I wonder how important the existence of gods was to Epicurus anyway, since his foundation was to simply not fear the gods (if they even possibly exist?) He certainly never, that I have seen, propounded on where they came from and why they exist at all, did he?