Really doubtful of the legitimacy of that wiki's claim, since it doesn't provide any source that talks about the kaiju's weight, and the official sources that Toho Kingdom uses that mention Baby Godzilla's height say nothing about it's weight.
Just because they haven't shown the ability to burrow doesn't mean that they can't do so. GTS Goji may have become stronger than his mother in adulthood, but by that point nothing signifies that he's any stronger than his siblings.
Apex asked me to be here. 1, the creator while giving TriStar female genitalia and the ability to have eggs, he has went on record adamantly saying Godzilla is male And I do agree with Apex here, as basically everything in the series basically shows GTS Godzilla being stronger in adult form, so suggesting he is stronger than his siblings in a no brainer. I would suggest perhaps using the weight of real-life animals of similar builds, such as some bipedal dinosaurs. The tunneling for GTS Godzilla is likely already 9-A via tunneling calcs, as for other Baby Godzillas, 9-C would likely be fine due to their natural weaponry and size leading to this level until a calc is made.