Interseismic deformation and strain rates derived from Global Navigation Satellite Systems (GNSS) or Interferometric Synthetic Aperture Radar (InSAR) data are often used to assess earthquake potential. InSAR measurements require GNSS data to put results into a geodetic reference frame, posing an issue in regions with limited GNSS data. Deformation rates are assumed to be indicative of long-term strain accumulation, and the evolution of strain rate throughout the interseismic period is poorly studied. We observe the interseismic period prior to the 2021 Mw 7.4 Maduo Earthquake. Using InSAR, we derive eastward velocities and maximum shear strain rate for three independent time windows to observe the temporal evolution of strain rate over time, whilst minimising the influence of near-field GNSS data. We find that strain rate peaks several years before the earthquake, contrary to recent studies showing acceleration of strain rate before large earthquakes, which has implications for earthquake hazard models globally.