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They relate to important concepts such as bound states in the continuum, spatiotemporal light steering, polarization M\u00f6bius strips, Berry curvature, and associated topological photonic phenomena. Polarization singularities, such as completely circularly polarized C\u2010points, are readily designed in real space through interference of differently polarized beams. In momentum space, they require instead sophisticated patterning of photonic crystal slabs of reduced symmetries in order to appear in the corresponding band structure with scarce in situ tunability. Here, it is shown that momentum space singularities can be generated and, importantly, electrically tuned in the band structure of a highly birefringent planar liquid crystal microcavity that retains many symmetries. 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