not always a POI is visible zooming on Maps. Mostly depends if the place have a storefront, but it can be also for other reasons. What I usually do is to search for the place on Google Maps, before to suggest an edit.
Also, most of the time, if a POI already exist, the App suggest you a possible already existing place. Is very important to be close to the place, when you add a new place, but the one that works better for me is the βsearch before editingβ
Be aware that an automated system cannot avoid 100% of our possible mistake, so it is up to us to be carefull before to make an edit.
I always assume that a place already exist, this help me to avoid most of my potential mistakes