When you submit, put yourself in reviewer shoes. Does your nomination have enough evidence about its location? If it doesnt have street view. Try taking picture which enable you to find other point of reference. Alternatively, you can also use gps tagged photo for supporting photo
Using the web submission, you can have up to 5 supporting photos. I would have a normal main photo showing the POI and normal first supporting photo showing the POI from further away (always include the POI in the first supporting photo!).
The four other photos could be used to show evidence that the cafe is popular and also show it from much further away so that the location can be shown to match to what is visible on google maps.
Imagine you don’t know where the cafe is and just have what you have shown.
You could also use an app like GPSmapcamera ( free and you have to avoid adverts) that prints the coordinates on the photo. Reviewers can then see better where the location is meant to be. So this could be one of your 5 images via the web submit.
Instagram only proof the cafe exist. Problem is reviewer cant confirm it exist where you submit it. Google map show that its dozens meter away from where you submit.
This issue happen because some people are known to missplaced wayspot away from its correct location for personal advantages.
I notice that the google maps pin shows this cafe in a location where it would be blocked from being a pokestop in Pokemon Go, but the submitted location would be a pokesotp.
@mar12marE did you missplace the nomination into empty cell in order to create wayspot? Please know that missplacement of wayspot submission is subject to abuse ladder system.