Hi.
A few months ago, I created a SharePoint list called Action Log. One of the columns is "Assigned To" and is a person column (settings below)

Next i created a Flow, to notify the people the action was assigned to.
So i selected "Send email" then when I choose "Assigned to" it created an apply to each, and then on the email to field i had the option that was "Assigned to Email" (that is not a column i created but i assume that exists since that column is "Person" type and it brings all the person's details

and it all works OK. Email is sent any time an action is assigned.
Now, i have to do something similar with another list (on a different site) and the column again is Person type called "Assigned to"
but when i go to create the flow, the Assigned To option does not show anymore, and if i select "Assign to" nothing happens
the column setting is the same

but now if i select "To" i don't even get the Assigned to option

i can search for it, but Assign to email is not showing either - and if i use Assign to, it gives me an error, because that is not an email address.
Why did it work on one flow, and not here?
Thanks