Debugging the NoCode part in bubble is super super super easy.

When logged into bubble, add ?debug_mode=true in URL.

See the bottom toolbar. Step by step through any workflow action. (Event based paradigm) or inspect any element and check any state/property. Not chrome inspect tools. Bubble has its own debugging.

Backend debugging is slightly trickier. The logs are harder to read. Sprinkling some database entries makes it easy