Hi, unfortunately I’m a novice at google inspect as well. I know some of the basics from this performance guide (The Ultimate Guide to Bubble Performance - the new edition is out (now 210 pages!)), but that’s it.
I recall in some prior posts where people had speed issues it turned out to be a plugin, and there may be something in there about how they debugged it using Google.
Good luck and I’m interested to hear what you find!