If easa would like to restrict you to a single type, it was not written revalidation or renewal of IRs (plural)
It is written in the privileges of your instructor certificate entered in Section XII of your licence - typically TRI A320 or something similar. In this case, unless you hold a separate FI or CRI certificate, you do not hold the privilege to instruct on SEP/MEP.
I had a similar case where a TRI was instructing a pilot for the purpose of SEP differences training - thinking that his TRI certificate entitled him to do so. They were asking for confirmation to provide to the insurance company, after the aircraft got bent, that he was appropriately licensed to conduct the training. He wasn't.
ifitaint...