Yes this isn't a problem.
Our house is on a 3 Phase supply, and we have a 3 Phase Smart Meter (supplied & fitted free - from Octopus Energy)... and we're on the Octopus Go Tariff.
We've got a dedicated 22kW Zappi Ev Charger on 3 Phase wired directly to the Grid via a 3 phase distribution board. Charges the Tesla at 12kW ... does about 67% of battery in the 4 hour cheap tariff window at night... or charges from Grid at 12kW anytime during the day at peak rate regardless of whatever the house is doing. It has no access to Solar or Powerwalls. It's ideal for emergency fast charging without draining Powerwalls, or busy back to back driving days, or Ev visitors/guests to the house and need a quick charge.
We've also got a 7kW Zappi Ev Charger wired directly into the Tesla Gateway 2 unit, which means we can also use this charger for cheap rate electric anytime night or day, getting power from our two Tesla Powerwalls and 7.2kWp Solar Array. Two Powerwalls discharge at 10kW so they're ideal for a 7kW ev charger.
Great thing about 3 Phase... is we can charge at 12kW on one Zappi Charger, charge at 7kW on the other Zappi charger, charge the Powerwalls at 7kW and run the house in the background... all at the same time, all during the 4 hour cheap night tariff.
The two car chargers are also load balanced, so if someone turns on an 8kW electric shower during all this... the car chargers reduce capacity until they finish... then ramps back up.