We have now discarded the original XIAO BLE on-board package (as you experienced, it was very confusing). Some time ago, we updated the new XIAO BLE on-board package. You guys can update the on-board package according to our wiki.
We divided into two XIAO BLE on-board packages, their application scope is different, we have marked which on-board package should be used in front of each case, you can then refer to the content of XIAO BLE low-power mode using the new on-board package to retry again.