Not very often, but sometimes a spammer will create an account and post one or a flood of posts trying to disguise a link to some other website. Obviously this is not you, but the fact that it happens from time to time tells me that there is no moderator review required for a new user's (or any user's) posts to be visible. Moderation here works the other way. in that only after a post is made and visible, then a moderator may step in and delete it, usually after someone reports it as objectionable.
I don't think this happened to you. I see two other posts of yours, both in the Engine and Transmission section:
Are fasteners GM or Toyota?
Well known issue?