I like ArcGIS Pro have settings to personalize the leyends of the maps, like ArcMap, if I like the title centered, the shapes of the symbols...
Thank you for submitting this idea Federico López.
The title can be centered by selecting that legend item:
Position > Horizontal alignment and center it.
The legend patch can be configured as described here: Symbolize feature layers—ArcGIS Pro | Documentation
This help might be useful: Work with a legend—ArcGIS Pro | Documentation
If there is something else specific that is missing, please provide further details.
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