Found episode?
From The Lost Media Wiki
https://archive.org/details/pooh-1
Found this on an old tape: Winnie the Pooh wants to follow a rainbow to the end to find a pot of honey. His friends realize this will never happen so they kinda fake it for him. I have no clue what this episode might be called! Please feel free to slot it in here necessary.
Could it be 30 : Rabbit and Eeyore Do a Good Deed?