Expedites are available for all USCIS filings and while it's worth it to request it here, your reason isn't like to meet the expedite requirements, which are listed on the USCIS website.
Is the correct term "Expedites", or "Expeditions"? Legal terminology seems to break language rules... The term for some (plural) things being expedited would be expeditions, but it seems from your response that, in legal terms, this would be expedites. This doesn't sound right. No source I could find agrees with the term "Expedites" as "plural of expedite". It generally returns something on the lines of "A third-person singular simple present indicative form of the verb "expedite.""
