If you have the LD2410B/C you can use the HLKRadar Tool on your phone to connect to the LD2410 via Bluetooth and you can do all the configuration there. It allows you to set the distance and sensitivity.
The following post near the top of this thread has the link to the tool for Android phones:
Tweaking the sensitivity for each distance gate is a little tricky. Make sure that Engineering mode is turned on and you should see the graphs in the HLK app. The pink/red line on the graphs is the energy value (its like movement percentage, the higher the value the more movement is required before the target is detected) set for each distance gate and the blue line is what the sensor is detecting. Once the blue line goes above the pink/red line, the target is detected.
You can also reduce the number of detection points (max is 8 which is the furthest range of approx 6m) if you don’t want to detect moving or static targets up to the max distance (ie. set it to 5 will cause the sensor to detect up to gate 5 which is 3.75m if gate distance is set to 0.75m).
I suggest having the app open and the graphs displayed and walking around the room to see how the blue line moves as it detects you being still or moving around.