Have the changes induced by the extraterrestrials to impair the Sun’s functioning also had a negative effect on the Earth’s magnetic field, or is that being perturbed directly through their advanced technology?

It is not either/or. It is both. There are direct sources of interference on the magnetosphere of the Earth planet. And in addition, the alteration of the Sun’s energy and its makeup have altered its interaction energetically with the magnetic field around Earth that normally provides a shield to deflect or absorb excess solar radiations and maintain safety from harm. Any perturbation puts people at risk and that is the intention for both of these interventions and manipulations. It is playing with fire in a very dangerous way, and that is intentional with full knowledge it will cause long-term harm, and at some point, will become magnified and then unstoppable in wreaking havoc. That is the desired outcome and speaks to the need to solve the extraterrestrial problem once and for all, and help humanity get on with things to move forward and beyond the physical plane you inhabit, through the planned Ascension, and enter a higher vibrational realm.