Over the past decade, temporal cavity solitons have attracted substantial attention for their rich dynamics and their myriad potential applications. Recently, there has been growing interest in understanding temporal cavity solitons in systems of coupled resonators, where both new physics and applications can emerge. However, temporal cavity solitons have only been experimentally realized in small systems of spatially coupled resonators, and realizing temporal cavity solitons in large-scale resonator arrays has not been accomplished. Here, we experimentally realize temporal cavity solitons on a 50-site array of time-multiplexed resonators. Using the Su-Schrieffer-Heeger (SSH) model as a case study, we find that temporal cavity solitons form preferentially at the boundaries of the array when the array is in its topological regime, and we observe the dynamics of coupled temporal cavity solitons that we call soliton pairs. Our work realizing temporal cavity solitons on a large-scale, programmable resonator array reveals opportunities to study the rich physics of coupled temporal cavity solitons in complex settings.