The way the poise bush and other shearable blocks have their drop tables set up make them unobtainable using shears from other mods.
For Example:
https://github.com/team-abnormals/endergetic/blob/main/src/main/resources/data/endergetic/loot_tables/blocks/poise_bush.json
I believe this issue extends into other Abnormals mods as well.

In order for best compatibility, it should use the forge tag:

"condition": "minecraft:match_tool",
"predicate": {
"tag": "forge:shears"
}