Exploring DSP Log-Level Data Accessibility and Bidstream Insights

We are investigating the availability and accessibility of raw log-level data from DSPs like DV360 (possibly via Data Transfer), TTD, and others. Our goal is to gain deeper insights into bidstream data for improved inventory transparency and Supply Path Optimization (SPO), including details such as seller IDs, ads.txt, bid prices, and clear prices. How easily can we access this data depending on the DSP we're using? Additionally, we are interested in understanding if page-level data for web or show-level data for CTV is available within the bidstream, acknowledging that availability may vary by publisher. Any insights or information on this topic would be greatly valuable. Thank you.