Hi. Thanks. The answer of non - 3 D symmetry could be quite wrong, under a few circumstances:

(1) Enforced symmetries due to Standard Model extensions to black and white holes

(2) And [ very similar if not the same ] the outcome of General Relativity for rotating black holes [ or white holes ].

The questions about how to account for rotational momentum for the Standard Model when merged with General Relativity singularities is something that probably should be left to expert mathematicians. { : < }