Why not ? The maintenance/repairs may have some issues show up and need to fix the “bugs” before being deployed to Ops.
I read an article saying the Eisenhower took additional planned days in crossing the Atlantic to deal with the issues you speak of. I know very little of how carriers are rotated, deployed, maintained, etc. I thought it was odd when I noticed three weeks ago that we had only two carriers at sea. It gets my attention that five are now at sea.