Looking for Movie that starts in heaven of babies

I think it was on the 70-80s maybe early 90
It starts in heaven with many kids and babies waiting for their turn to be born and sent to earth

2 small kids holding hands and cry
The main character asks why they cry, someone explains , their time to be born is not synced so they will not meet on earth

It bothers my mind for so long
Please help me find it

blue bird (1976)?

specifically around 1 hour 18 min

Reminds me of Made In Heaven (1987)
with Timothy Hutton and Kelly McGillis.

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Is it live action, or cartoon?
Could it be “Hooberbloob Highway”?