Bubble apps rarely score well on those types of tests. Most Javascript heavy sites don’t really. Try AirBnB for instance.
With that said, if set up properly, you and your users won’t really notice any issues with performance. If you’re not familiar, check out this guide by @petter: http://forum.bubble.io/t/the-ultimate-guide-to-bubble-performance-the-new-edition-is-out-now-210-pages/158948