>>1340739The core: "Major muscles included are the pelvic floor muscles, transversus abdominis, multifidus, internal and external obliques, rectus abdominis, erector spinae (sacrospinalis) especially the longissimus thoracis, and the diaphragm"
The deadlift absolutely involves those muscles and the main ones exercised are the 'Erector spinae' (while the rest of the core muscles help stabilize the back). Glutes, and hamstrings.
So we can definitely conclude that the deadlift is a core focused.