All I have to offer is try acceptance. This is your reality. Maybe it stinks right now, but accept this is what life has given you. Everyone here sees you, hears you, knows your pain and that it is completely unfair. Knowing all this, you take care of you and the children. You feel bad when you feel bad, and take all the little wins as the positives they are, even if it's just getting out of bed when you don't want to. Healing is not linear.
While on garden leave, try something new. Get out and about if you can, even if it's just taking yourself to lunch.
Search for new opportunities, even though you cannot apply for/accept them just yet. Know what is out there and what you might like. Should the perfect job arise, you might request an early release (depends on the situation).
Play games with your kids. Indoor and outdoor. Rearrange your space. Find a new hobby. Build bird houses and give them away. Go Geocaching. Do something and celebrate the win.
Once you accept "this is what I have, what do I do with it?" slowly, slowly you will heal more. It's easy running on automaton mode (get up, go to work, pick up kids/dinner/dry cleaning, come home eat dinner, watch TV, go to sleep rinse and repeat). It's hard running on "Who moved my cheese?" mode. Accept that and roll with it, good or bad.
We get it. You get it. At some point you will also know you GOT this. It just takes time.