here it is only briefly recorded, and in a somewhat sorrowful tone.

He came back humbled and forgiven, indeed, but not in a happy state of
mind. He came back to a ruined kingdom; to a sinful and demoralised
and destitute people; to see everywhere the sorrow, and the evil and
the misery and shame which his doings had caused; to be reminded
continually that his life had been a great wicked and foolish blunder,
and that there was no undoing the mischief which he had done. For the
sake of his repentance he was spared a little longer, but there could
be little joy in the remaining years of a life like that.

I think that that is the experience of most men who turn away in their
youth from the example and precepts of godly fathers, who reject the
truths which make life sober and strong, who betake themselves to
thoughts of infidelity and ways of sin, and fancy that they can live
life happily without God and prayer. There comes a time when they are
made to feel that their life has been a mistake, that it would have
been far better for them to have stuck to the old ways, that those
believing fathers whom they laughed at were right after all; perhaps
they repent and go back to God at last, and He accepts them; but
whether repentant or not, they always carry with them an awful burden.
Shame is upon them for the evil they have done, shame for the life that
has been spent to so little purpose, regret and humbling that they
cannot undo the blind and guilty past. Repentance at the best is a
poor business when it comes in the evening hours of life. Better then
than never; but better far to have gone with God from the beginning.
That, I think, is the lesson which the wise man will find in the story
of the evil king.