I helped a Subaru in a…
I helped a Subaru in a similar situation about a month ago....you need to dig out around all 4 tires/under the auto anywhere snow has accumulated/a path in front & behind
You don't need 4 lo or diff lock
4 hi will be fine once you move all the snow
If you tried to free yourself by flooring it, you made the snow removal a bit more difficult
Once you are stuck, never over accelerate trying to get out
It never works
Always carry a good snow shovel & small one for the clearing under the auto