Hi, StreetSurveyor!
My name is Konstantin, and I’m a mapper on the OSM team at Lyft.

Thank you for reaching out.  I have added access=private tag according to “Private Road. No Thru Traffic” sign on our ground truth imagery 2024-04-10: https://drive.google.com/file/d/1NSW65CBhqEvxNQPmXPEeTqm-b9_BIc8_/view?usp=sharing, located 42.35071, -71.06502.
Unfortunately, it's not possible for us to individually confirm each change in person, and doing so isn't required for mapping in OSM. But in this case we also have a Lyft driver’s feedback from Jan 4th 2025 that it is a private alley. Undoubtedly, local data is extremely valuable and always holds more significance than other information. I would greatly appreciate it if you could share why you consider my edits incorrect. 

Best regards, Konstantin.