Brushes cannot be enchanted

When trying to enchant a brush with /enchant @p unbreaking 3 or /enchant @p mending while holding the brush, an error message pops up saying "The selected enchantment can't be added to the target item: <player's gamertag>". A Brush also cannot be enchanted via an anvil when being "combined" with an unbreaking 3 / mending book. I don't know how to indicate the affected versions (since this is my first bug report) so I am writing them here: 1.19.70.23, 1.19.70.24, 1.19.70.26, 1.19.80.20 and onwards...