How do I browse raw data in Health Connect?

Open Health Connect. This differs by device and Android version, but if you don't have an app icon for Health Connect in your launcher, you can find it by opening the Android Settings app and searching for "health connect".

Next, tap "Data and access". This opens the screen from which you can browse all your data by category. Choose a category, for example "Activity", and from there you can see a list of its attributes, for example "Steps". Tap "See all entries" on this screen to browse your raw data for the attribute.