It is possible to break this block in Survival (via explosions, replacing with liquids), however the block does not have a loot table assigned, unlike all other blocks legitimately breakable in Survival, stopping its drops from being customizable.
Linked issues
relates to 7
MC-273944
Items removed from flower pots may be hardcoded
Resolved
MC-173732
Fire and soul fire do not have loot tables
Resolved
MC-202586
Unbreakable blocks do not have loot tables
Open
MC-273941
Scute drop from turtles appears to be hardcoded
Resolved
MC-273942
Scute drop from armadillos appears to be hardcoded
Resolved
2 more links
They are unbreakable, so why should they?