Kashyyyk Origin Tree Stuck At 93%

Hey I had this issue too but I found out what the problem was, even though I found all chests and echoes.  I was playing on the new journey+ so there's that small area with a chest that I didn't bother going into because I had that chest from a previous playthrough.  However, that was what was stopping me from getting 100%.  once i walked into the same area where the chest was (by the eggs in the back), I got my 100%.