These can be signs of things other than brain damage, more common things like stress, depression, exhaustion or even overdoing fields. And, as you say, they can be symptoms of “long COVID,” as well.
And my point is not to correct you but to help you properly identify what might be causing these things for you because, as we say in my country, “the true diagnosis is half the cure.” So, you can decide which (of the many possibles we have) fields will help you.
First, review your field usage. Are you overloading your energy systems (particularly when you’ve got as much going on in your physical world as you do)?
I (if I were in your position) would broaden my sights to make sure I’ve included all the possible things which could be causing these symptoms, so I could get that correct diagnosis I’d mentioned.
From what you’ve mentioned here so far, I’d try Restoration From the Long Haul.
I see you’ve amended your OP.
Fatigue’ll do that to you. So will depression and exhaustion.