A tool we use very frequently in Arc Catalog, when we have one-off custom map productions that call for modified data, but everything else is the same, I can globally switch out the FGDB driving the product.
What is the equivalent in Pro?
I was looking for this functionality a few weeks ago as well but came up with nothing. It ended up being a manual 'set source' process for each layer.
I asked this same question a few months ago and received no replies:
Set Data Sources Tool in Pro
Retrieving data ...