“Absolute garbage’: TikToker settles accounts with plant department in hardware stores. “It has nothing to do with nature conservation”: Many ornamental plants are of no use to bees etc.
Avoid plants that don't produce pollen or nectar. Exotic trees offer little food for insects and crowd out the native flora. Create a pile of rocks. Stones attract heat-loving animals and thus contribute to biodiversity. You can also create optimal conditions for bees & co on your balcony.