Iron-based 1111-type superconductors host the highest superconducting transition temperatures (Tc up to 56 K) among iron pnictides, yet their fundamental electronic structure and potential for topology have remained a long-standing paradox. In this work, we employ micro-focused angle-resolved photoemission spectroscopy to spatially disentangle the electronic signatures of distinct terminations in CaFeAsF_1-xO_x. We identify the FeAs termination as a heavily hole-doped surface, whereas the CaF termination acts as a transparent window to the bulk-like electronic states. Crucially, we report the direct spectroscopic visualization of a topological surface state, positioning the CaFeAsF family as a topological superconductor candidate. This observation indicates that strong electron-electron correlations can drive the requisite band inversion between the p_z and d_xz orbitals. Our findings demonstrate that electron correlation is a decisive architect of topological band formation in iron-based systems, which fundamentally reshapes the search for high-temperature topological superconductivity and underscores the universal role of correlation in realizing non-trivial quantum phases.