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https://www.doorbellmount.com/collections/90-degree
Locations on where to use the adjustable swivel mount with a few reviews and location example photos. Perfect applications. This is where you want to use the 90 degree swivel Mount.
But you can also use it on Narrow Trim. This trim was about 1.5 inches wide. The base on the the swivel mount is 1.8inches. So there was a little overhang on the side but it did not affect the installation and still worked fine there. He could have used the narrow base, but it was not required.
Here is another one on bricks. You can also customize the hole spacing if you are mounting on bricks so you dont have redrill your holes.