If the axles aren’t buried yet:
1) deflate tires to 12 psi
2) dig out behind each wheel
3) place traction boards behind all 4 wheels
4) use 4Lo and try to extract in reverse
If the ground is soft behind you may need plywood (or steel) panels to get back to high ground.
If that doesn’t work you could try a rear hitch mount winch. But you may need something on treads to get out there and extract you.