my 3d objects not displayed once the apk files created/installed on my phone but camera still works

hi everyone
i started my project on unity with the desire to create thanks to photogrammetry: a kind of app which thanks to an image tracker would display my model - so i try ar since many months

unity and vuforia works well
my phone is an android - galaxy s5
no problem with jdk ndk etc

everything is going well
even when I test with my computer’s cam (hp pavilion notebook)

so I export
my phone supports apk file
but when the app opens, the camera works but my object does not appear while all the parameters worked on my cam

i tried to change my 3d object (maybe too big for my phone idk) so I put a simple cube.
but it still doesn’t work

does anyone have the solution ?

Your shader may not work on your phone.
Check the shader or force to add shader in your apk.