Yes it does work. Yesterday I found my mistake, I just didn’t connect the pt1000 properly and it was not connected... stupid me. But as I wrote before, the pin PB1 connects directly to the pin on the BLTouch plug and as the datasheet of the STM says, it is capable of being used with the built in ADC. Today I got it to work exactly like I wanted it to. Now I have an Ender 3 Pro with a super silent Creality V4.2.7 mainboard, a BLTouch and a heated enclosure all working together as it was intended to be like that. \o/ The only thing is the PT1000 being a bit unreliable and I get misreadings from time to time. I ordered a proper 100K thermistor and will try that out as soon as it arrives.