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You could look over on Missing Child, but there's not that many works listed
OH MY GOD; MY PARENTS ARE GARDENIIIIINNNNGGGGG!!!!!
Maybe Beyond
?
I have a show in mind called 'The Family'. It aired in 2016 I think, and it had a kid that was missing (kidnapped) for 10 years and then returned to his family. Not sure about the superpowers bc I only watched 1 or 2 eps, but maybe this is what you are thinking of?
That could be a character from The 4400?
I'm searching for a tv show that I watched not too long ago. It's about a child who was ought to be lost/dead came back as a grown guy to his family, but he suddenly had superpowers. I remember a scene where news outlets were going after the family right after he returned. Also remember a scene where he melted some stuff in his room.