Pretty new to HN. Are PoCs commonly shared?
Prof of concepts can be posted if they are interesting, whatever interesting mean and whatever the hivemind thinks is interesting.
For something like this post, a site that works only in one city may be fine, but a waiting list no.
For personal projects you can take a look at https://news.ycombinator.com/showhn.html but similar criteria apply to other projects like blog posts. It's not necessary that they are 100% finished, but they usually get more traction when they are well written and interactive and it's clear it's not a stupid thing that the author did in 5 minutes. Warning: You may get unrequested feedback!
PS: Looking at your comment history, most of them are too short. It's generally better to write longer comments. It's not a hard rule, but it takes a few years to guess when a short comment is a good one.