Hello everyone.
I made this modification for bambulab A1 and A1 mini so that you can make timelapses using your phone.

It consists of a $1 bluetooth remote control holder from aliexpress:
https://it.aliexpress.com/item/1005006864734985.html

You can simply install the mount on your bambulab by unscrewing the front screw and the bottom screw on the left side of the x-axis.

Finally you will need to edit the gcode for timelapses by changing the print profile.
In the Timelapse gcode section you will need to replace the M400 P300 line (which consists of a 3-second pause) with the following lines:

M400 P10
G1 X10
M400 P300

This code causes the print head to stay at the x = 0 position for 0.1 seconds, and then move to x = 10 for 3 seconds to allow the software to take a picture.
If the printhead appears in your shot, you can change the G1 X(your value) line as desired.

To make a timelapse you can use any timelapse/stop motion video app, or take photos with your device's camera and then make a video with editing software.

Enjoy :)