This reminds me of adding playground equipment to the playground (node) versus adding equipment nodes/areas separately within a playground area.
The following features could be placed on a amenity=(bicycle_)charging_station area:
In my oppinion, bicycle and car charging stations should get different presets in OSM editors due to the different features relevant for each. As far as I understand, this can also be solved by a subtag like charging_station=..., 275 hits on taginfo.
By the way, there was also a related discussion in the “Germany” forum on device_charging_station vs charging_station vs locker with respect to bicycles: