I have a facebook page for RetroBlade, here: https://www.facebook.com/RetroBladeComic
As a few others have said- I don't think Facebook is the best platform for comics, especially now that they've introduced the new algorithms that discriminate based on how many likes, comments and shares each post gets. If you don't promote new posts almost nobody sees them, regardless of how many page likes you have. Ugh.
Well, anyway, I do post comic updates on there and a few news pieces, but over all I've had much more luck with Twitter