Under EASA yes however; since Brexit a few things have changed and it rather depends where you did the training, if it was the UK then you will have to complete the AoC with a UK FIE. Elsewhere in Europe you can fill your boots except that the UK is no longer an EASA State so if you trained in an EASA State and do your Aoc with a UK FIE, you could obtain a UK Part FCL FI Certificate but not an EASA Part FCL Certificate.