Entry Unlock and Unlatch Functions do not Operate Using Kick Sensor [10/2018 - ]: Description
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2024 Lexus UX 250h, 2023 Lexus UX 250h, 2022 Lexus UX 250h, 2021 Lexus UX 250h, and 2020 Lexus UX 250h. However, it is still accessible from the selected car via links, so may be relevant.
If the hands free power back door function does not operate, it could indicate the certification ECU (smart key ECU assembly) did not transmit a power back door open request signal, or a malfunction in the power back door system.