I don't know how to apply textures to all 6 faces of an orientable block.
{
"parent": "block/orientable",
"textures": {
"front": "tutorialmod:blocks/ugonnalive_block_front",
"back": "tutorialmod:blocks/ugonnalive_block_sides",
"top": "tutorialmod:blocks/ugonnalive_block_sides",
"bottom": "tutorialmod:blocks/ugonnalive_block_sides",
"side": "tutorialmod:blocks/ugonnalive_block_sides"
}
}