I’m surprised you saw that much of a speed improvement, but I guess I ran my old i3 clone somewhat fast. My tuned/reliable profile (on Prusaslicer) on the Ender 3v2 was 40-60 mm/s and acceleration 200 mm/s^2. The stock profile (on Orca) for the SV08 is 200-300 mm/s and acceleration of 20000 mm/s^2. That’s probably why such a dramatic speed increase.

Were you homing z with the bed cold? If homing z involves touching the build plate, I could see this. The auto z-offset on the SV08 heats the bed to 65, then does a QGL, followed by cleaning the nozzle, then the z-offset calibration (using the inductive probe), followed by a bed mesh, then a test print. Most of what I’ve read is that the heater is not the most efficient at heating the bed up completely. That’s why everyone (Sovol included) recommend heat soaking for the initial z-offset. After I did that, I’ve had no problems with first layers.