Jim, re: Google Streetview seems to me screenshots are allowed.
From
https://about.google/brand-resource-center/products-and-services/geo-guidelines/
You generally don’t need to submit a request to use our mapping products for the purposes covered in these guidelines. As long as you’re following our Terms of Service and these guidelines, as well as attributing properly, feel free to move forward with your project.
the Google street view guidelines say under Personalizing your map
" If neither of those (the tools available) fit your needs, you may export an image from Google Earth or Earth Studio, or capture a screenshot from Google Maps, to add custom labels or graphics using third-party software."
And under Google Earth
" Google Earth or Earth Studio can be used for purposes such as research, education, film and nonprofit use without needing permission."