Nobody is talking about banning the sale of gas boilers. What is happening is that new builds will have to be built with heat pumps from (if memory serves) 2035. Please don't scaremonger.
Further, it is possible to run a heat pump at high temperatures: some use refrigerants specifically designed to do this relatively efficiently.
Further, it is possible to run a heat pump at high temperatures: some use refrigerants specifically designed to do this relatively efficiently.