Sunspots, Comets and Ball Lightnings are interference micro black holes.

In String Theory called Q-FFF ( Quantum Function Follows Form) Theory all black holes are based on a compact string nucleus, with different numbers of strings. So: it is not a singularity.
There are micro black holes called comets and ball lightnings even Sprites and Elves.
Conclusion: there are different sorts of black holes (BHs);
A: Stellar Implosion BHs (Super Novas) with a nucleus of compacted strings.
B: Interference String Knot BHs also with a nucleus of compacted strings and made by Magnetic colliding photon knots, compressed by the local oscillating vacuum strings called Axions.
C: The Big Crunch/ Bang Black Hole, in balance with the decreasing pressure of the oscillating Axion vacuum impacts consumed by the latest BHs.
see: Expanding Earth, by Growing Water based Crashed Comet core.
https://vixra.org/pdf/1806.0298v1.pdf
Plasma Production Out of the Vacuum by Axion String Collision Around Each Black Hole at the Penrose Trapped Space Surface.
https://vixra.org/pdf/2012.0205v1.pdf
https://bigbang-entanglement.blogspot.com/2020/12/comets-and-ball-lightning-are-still-not.html