question about batch

[Flu09]

Hello, I have 3 studies which I want to annotate using a built reference. I wonder if what I am doing is correct. I label transfered from the built reference for each dataset. I integrated the 3 studies by Seurat and harmony in R using seurat v5. but I started here in symphonypy from counts and followed the tutorial. Should I label transfer for the whole object and not one dataset at at time? would the batch corrected object help at all?