Hello @GErma.1
First of all, please note that the LPTIM feature is only available for some STM32G0 series such as STM32G071xx, STM32G081xx, STM32G041xx, and STM32G031xx. So make sure that your microcontroller is one of these supported devices.
if that's the case, you can try enabling it with STM32cubeMX, once the code is generated, the LPTIM drivers should be installed in your project!
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