Apps front camera not working

I have iPhone 7 Plus iOS 13.5.1

my phone camera is working fine both front and back, but when I try to open camera in apps it just won’t work. Shows only black screen. I try to call via FaceTime, WhatsApp but it just show back screen, when I change the camera from back to front, it just joes black. I have installed different apps and try to run it but it just won’t work.

i tried resetting my phone

uninstall/reinstall Apps

complete erase phone

i need solution...