Any non-Ather vehicle can be charged using Ather Grid if its connector is compatible with 5A/15A socket.
Only Ather vehicles are compatible with the fast charging protocol of Ather Grid today, the reason why other vehicles cannot be fast charged using Ather Grid. AC charging for Non-Ather vehicles is available up to 2.5 kW.
The charging point installed at home is meant only for charging an Ather vehicle. You could use Ather Grid - the public charging network that’s open for all EVs. And, it’s designed in a way that it allows the use of a regular 5A/15A plug that most of the other EVs use.
Ather vehicles use a specially designed connector that’s of a completely different make and can't be used by other vehicles to charge. That's why all non-Ather vehicles need to carry the adaptor/charger of their own vehicle.