Google Maps "Website Clicks" Data

[bdec21]

I'm seeing a persistent gap between "website clicks" as reported on my GBP and sessions arriving on my site with the Google Maps UTM I set up on my website link. Last month, I had twice as many sessions with a Google Maps UTM as my GBP is reporting website clicks. I'm confident that the UTM is correctly configured, and I'm wondering whether there's any reason to believe that the "website clicks" data from Google could be off. Any insights here would be much appreciated!