I found the normal Pixel 5a on Amazon from the Google Store (link in OP is also Google Store): https://www.amazon.com/Google-Pixel-5a-5G-Snapdragon/dp/B09N4P1ZW1/

$500 instead of $350. I don't mind paying $500 if my assumption about the usefulness of network switching is correct. Would you guys recommend paying the extra $150?

Edit: These links aren't sold by The Google Store, I'm not sure why Amazon.com puts Visit the Google Store under the product title. They're sold by 3rd parties, e.g. "mercate group". TIL how to read Amazon better.