Is this a joke?
With the Tesla nav, you have the power of Google Maps for searching. Have you even tried entering "arbitrary" text in the search field? You can ask for any kind of food (fast food, asian, italian, etc.), any kind of store (by name, type of product they sell, etc), tourist attractions, airports (by name in several languages, airport code, etc.), whole or partial adresses, parking lots, superchargers, etc. You can also see stars-based Google reviews of the search results (awesome for restaurants).
I haven't tried using a phone number, but I wouldn't be surprised if it worked, since it does work on regular Google maps.
My friends are actually blown away by how seamless and powerful the search is in my Tesla. Now, if you want to permanently show POI icons, indeed, you cannot do that (of course, it depends on your needs. The only POIs I used to display with my old car were gas stations...). Weather is not available either (and I was not aware that every low priced car had this kind of information).