Function like "transfer existing data" in Zapier

Hi I’m searching for a function like the “transfer existing data” in Zapier.
I need to start the workflow for old leads from FB. How I can do it?
In Zapier I can do this with the above-mentioned function, selecting only the desired leads and activating the transfer.
transfer existing data

When you have an polling trigger module as the first module in the scenario you can right click on the module and select “choose where to start”. Then it will search all records available and give you a list where you can start. This will start processing from that record.

I can’t do it with Facebook Leads trigger.

Is it an instant trigger? You can’t do choose where to start with those. Only acid watch modules.