
Is there a data export feature ( like other Dynmaics 365 products) for 365 for financials?
You can use the "Edit In Excel" action (on most list screens) for this. You can also generate a configuration package that contains data from several tables. The configuration packages are normally used to migrate data into Financials, but these can be a convenient way to get a quick export, as well.
You can also use the "Create Data Set" action from the Web Services screen to create a connection for exporting data from the tables within Financials. This is very useful (and convenient) for a number of uses.
If you are mainly interested in analyzing data with an external analysis tool (e.g. Power BI), I think you'll find this to be especially useful.