In layer properties --> Style, you have different structures of the frame that displays the classification:
Categorized and graduated symbologies provide you with symbol, Value and Legend columns
Rule-based symbology propose label and Rule columns
It could be nice to:
Move the label column at the right (as the legend one is). With the layer styling panel, when you are used to simple symbologies, you can easily break the rules you wrote as the you are used to the last column being the legend one
Rename label into Legend for consistency (or vice-versa?)
split rule-based frame also in three columns (symbol, rule, legend)
In layer properties --> Style, you have different structures of the frame that displays the classification:
It could be nice to: