Let's see the context. Ezekiel 17:
22“ ‘This is what the Sovereign Lord says: I myself will take a shoot from the very top of a cedar and plant it; I will break off a tender sprig from its topmost shoots and plant it on a high and lofty mountain. 23On the mountain heights of Israel I will plant it; it will produce branches and bear fruit and become a splendid cedar.
Israel is associated with the splendid cedar.
Birds of every kind will nest in it; they will find shelter in the shade of its branches.
It would bless all kinds of birds/peoples.
24 All the trees of the forest will know that I the Lord bring down the tall tree and make the low tree grow tall. I dry up the green tree and make the dry tree flourish.
Trees symbolize different kingdoms. God has the power to do as he wills as in Luke 1:52
He has brought down rulers from their thrones,
And has exalted those who were humble.