This not correct @JeffryRisandy. Within Google Maps, the term “Star Photo” does not appear and @MichelleMaria can indeed declare her photo as a “star photo”.
The term is used in Top 100 Local Guides leader boards. You need to register here by logging in with your Google account. Then, under “Date Entry”->“Star Photo” register you photo and add it into the album in Connect. Next month (or after two months?), your photo appears in Top 100 Google Maps Local Guides Star Photos (April, 2026) - #4 by AdamGT .
If you have any questions have a look into Discussion on Local Guides 2026 Star Photos or let me or @AdamGT know.