The person I’m replying to posted three or more links to their project in unrelated threads in 24 hours or less. Presumably you will not be quite so aggressive :)
Show HN has been absolutely flooded since generative code AIs became popular, so if the site lets you post a Show HN, then you’re generally welcome to once. If nothing comes of that, best wait a while (like, weeks) while you continue participating.
(I’m not a mod, if dang/tomhow show up and comment then whatever they say takes precedence.)