Why is there no filter in Import from LM Repository?

It's the one you sent above:
https://www.logicmonitor.com/support/logicmodules/about-logicmodules/keeping-your-datasources-up-to-date/

in this picture it shows a "show diff"

but when you in the actual "Import Dialog" it just has 3 status "New"and "Updated - in use / not in use"

You have to actually click on the "Updated - xxxx"  status and it then pops up the diff window.