This video should explain it a bit better:
(sorry if shaky, I just realized that 4k60fps doesn’t have movement stabilization)
Essentially, after inserting the portafilter, the temperature will drop and stay between 91.4-91.8 and stay there, add 0.5 degrees to that number, and that is the average temp during the first extraction. This temp will eventually increase if the portafilter is left there long enough (IDK how long exactly, I observed this phenomenon after a cold start with the pf locked since the begging), to around 92.5-93, again, add 0.5 to that to get the average stable brewing temp.
As I said above, the temp I get without the portafilter is 93-94, after adding 0.5, the average temp, in this case, is 93.5-94.5 during brewing, which is very high for the lowest setting and was not the case with the machine in the first weeks of use, and it fluctuates much much more than the extractions using the processes described above, which are very stable.