There are no evidences for hot or cold volcanism on any historically recorded comet. Only gas, dust fountains and geyser-like outbursts, caused by the sunshine. The nucleus size and mass is far to low to have an internal heat source. ( diam. 60 km )
We know that the lower bound for the diameter of a gravitationally rounded object is ca. 500 km. Then a hot core and crust can be formed, but not necessarily.
The measured speed of the dust outburst is less or similar to Halleys comet. So extraordinary claims need extraordinary evidences.
According to NASA’s Dr. Rosaly Lopes :
Cryo-volcanism occurs on larger moons because of an internal heat source. And liquid under a crust.
https://education.nationalgeographic.org/resource/cold-explosion/

The table show previous outburst expansion speeds (ref. January 14, 2025 link under):

Jan 14, 2025 0.08 km/sec.
Jan 12, 2025 0.07 km/sec.
Nov 14, 2024 0.12 km/sec.
Nov 7, 2024 0.10 km/sec.

Halley's comet 0.11 km/sec.
Comet Hale-Bopp 0.16 km/sec.

Time: 02:07UT 2025-02-01 Exp. 38 X 125sec
Tel: 0.254m f/7.5 ST-10XME CCD 2x2bin 1.5"/pix
Odd Trondal Obs.code 238 (Uranium). Oslo Norway.

Sun distance (au): 6,26 Perihel 28.March 2019 Sun dist.(au): 5,77