How long do TPR appeals take????

We had a little boy whose mom was TPR'd. He moved to an adoptive home (we were foster only). The case was very complicated as the bio had followed her plan but did not finish in time--if there was ever a case I thought could be overturned it was this one. 6 months later the appeal was denied (the appeals court acted like it was a no brainer). Bio could not take it to a higher court because she would have to pay all the costs. In my state you cannot adopt for 6 mo after the tpr anyway, so I don't think any time was lost. Try not to worry (I know this seems impossible) but the odds are sooooo against the bio (like less than 5% chance) at this point.