The internal pivot point on one side of mine broke just before the lockdown started. I'm still under warranty so I'm hoping to get it fixed that way by the dealer when things go back to normal.
Mine was replaced by the dealer under an extended warranty as it broke internally. It comes as the block of 3 switches and just snaps in to the console. Google for part number 93766-E4050CA (with parking sensors) or 93766-E4150CA (without parking sensors) - many of the parts sites have exploded diagrams of the console.
See the online service manual that was posted on this forum https://www.ksoulev.com/kia_soul_ev_ps_ev_2015_2020_service_manual-2239.html starting with https://www.ksoulev.com/epb_switch_repair_procedures-2423.html