In this case you need to answer the question as asked...no, you do not have an unrestricted ATP.
If they were interested in R-ATPs, presumably they would have a check box for that.
If you're applying for a regional, I don't know why it matters for FO's. An ATP is not required for ICAO ops, and an R-ATP is legal for an SIC in the US.
I doubt a major would touch anyone under 23 anyway.