Transition metal dichalcogenides (TMDC) are excellent models for the exploration of semiconductor physics at the 2D limit, with potential applications in electronics, optoelectronics, and quantum devices. The strong Coulomb interactions and distinct structural symmetries in these materials give rise to a rich variety of photoexcited states, including excitonic complexes that are tightly bound electron-hole pairs, and valley-spin polarized. However, directly accessing the momentum direct and indirect excitons and their dynamics are out of optical experimental reach. Here, I will talk about the generation of high repetition rate higher order harmonics (HRR-HHG) and its coupling with momentum microscope, to establish HRR time- and angle -resolve photoemission spectroscopy (TR-µARPES), demonstrated on a micron-scale monolayer WSe2 flake (1). This measures the momentum direct and forbidden excitonic states across entire Brillouin Zone (BZ) and measures their dynamics under different excitation conditions (2). The direct access of excitonic energy-momentum distribution leads to the measurement of excitonic wave function revealing the exciton size in real and k-space, whose electron follows the downward curvature of its partner hole (3). Beyond excitonic states, I will also visualize the evolution of the conduction band electrons in a 1LWS2-gated device captured through nano-ARPES (4). [more]