European Long Range Highland is still certified at 366kW maximum combined power. This is the certified power level with active acceleration boost, so Tesla has prepared the paperwork for activation of acceleration boost.
Also, when the current LG 5L, was introduced in Q4/2021 the acceleration boost was initially not available for these cars. It took weeks/months until it was offered as in app purchase.
This is not a confirmation for anything, but at least it provides some hope, that the feature will come in the near future.