Any non-Ather vehicle could be charged using AtherGrid if it’s connector is compatible with 5A/15A socket.
Only Ather vehicles are compatible with the fast charging protocol of AtherGrid today, the reason why other vehicles cannot be fast charged using AtherGrid. AC charging for Non-Ather vehicles is available up to 2.5 kW.
The Point installed in a house is meant only for charging an Ather vehicle. You could use AtherGrid - 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 adapter/charger of their own vehicle.