B2N2 Currently I have only an EASA Part FCL License with an FI(A) rating.
I don't have any FI(A) hours logged yet as I have just obtained it.....
As you have a brand new EASA FI Rating you are restricted to only instructing for an EASA License whilst being supervised by an EASA ATO.
FCL.910.FI FI — Restricted privileges
(a) An FI shall have his/her privileges limited to conducting flight instruction under the supervision of an FI for the same category of aircraft nominated by the ATO for this purpose, in the following cases:
Log the hours flown on your FAA License and Log the hours as CFI but make sure you
do not rely on these (or solo sign offs) to un-restrict your
EASA FI Rating - I suggest you note in remarks column whether any instructional flight was for FAA or EASA.
For Instructor renewal EASA simply states 50 hours of instruction during validity period - implies instructing for an EASA License/Rating but doesn't actually state it.