Bambu Studio supports to set slicing parameter for all selected objects at one time.
Select multiple objects, switch to object mode on left side bar, and then change parameter values. The changed parameter values will be applied to each selected object.
For an introduction to the priority of Global and Object parameter settings, please refer to this wiki:
https://wiki.bambulab.com/en/software/bambu-studio/how-to-set-slicing-parameters