Can a charging point get its own price per kWh?

Yes, a charging station is a separate object with its own QR code and its own kWh price, separate from the price for the accommodation. You set that price yourself and adjust it whenever you want, for example higher than household electricity because charging requires more power. Revenue from the charging station and accommodation are shown separately in your overview. For occasional use, the difference with simply including it in the household electricity price is presumably small.