The present disclosure provides a display panel and a manufacturing method therefor, and a display apparatus, which relate to the technical field of displaying. The display panel includes a first base plate and a second base plate which are aligned with each other; the first base plate includes a first substrate and a thin film transistor; the thin film transistor includes an active layer; an optical adjustment layer is disposed on the second base plate; an orthographic projection of the optical adjustment layer on the first substrate overlaps with an orthographic projection of the active layer on the first substrate. That is, the optical adjustment layer corresponds to the active layer. In a laminating direction of the display panel, the existence of the optical adjustment layer with a certain height enables a reflecting surface of the second base plate to be closer to the first base plate.