Well, after a little test. The phone has charged from 2% to 100% in 1 hour 17 minutes approximately.
It is a 30W Ugreen charger with 2 inputs, one QC 3.0 and the other 5v 2.4A (use USB port QC 3.0)
I feel that the load is normal, but compared to the one that comes as standard, this one charges me better (I calculate that it has to set the load to 5v 2.4A, since the charger is adaptive charging, we are not going to ask much of it at an average range of 2 years ago)
As a clarification, the charging was carried out with the phone turned off
The phone didn't heat up during charging, which is good.
Well, that's all I can get out of the LG Q6's "fast charge"