Angels, unlike Spirit Guides and Loved Ones, have only been Angelic before now, and therefore, they have never taken human form.
This is the rule.
Using this logic, deceased Loved Ones, once they leave this Earth - stay deceased Loved Ones, and while they can visit, watch over you and provide guidance and assistance - they don’t ascend as Angelic beings.
But, what if your Loved One always was an Angel?
What if your Loved One while on Earth was an Angel in a physical body?
This is just one exception to the above rule.
And this is often the case with children, who were lost early in life.
Just as an individual with a physical body can transition into a Spiritual body, individuals with Spiritual bodies, can occasionally transition to be within a Physical body - when the time calls for it.
Do you have a Loved One in Spirit that you felt . . .
Always looked out for you
Acted as a protector in your life
Brought you joy and happiness
Reminded you to be happy, playful and kind
Was gentle, caring and compassionate
Seemed to be more loving than most
If you do, this person may have been an Angel, simply manifesting in a physical body, during their short time here on Earth.
This often happens with children, who pass and cross-over into Spirit very early in their lives - they ascend into the Angels that they always were.
Thus, in answer to the question we’re asking,
“Can children become angels after death?”
Perhaps, they already were.