E.g. here's an experiment I ran with an EEG. Seems pretty tangible.
https://mindmatters.ai/2019/12/playing-tetris-shows-that-tru...
I honestly don't understand why these sorts of ideas receive so much friction. I cannot think of logically coherent objections to them. They seem very scientifically testable to me.
Because then it stops being metaphysical and becomes physical.
Now as to your central problem, conciousness being beamed to brain. The reason why it gets so much friction is that it flies agains a massive amount of tangible evidence and research that brain generates conciousness. It also falls to Occams' razor very easily (like the idea of ether medium did - a PhD in electrical engineering should know this). And in it's core it is basically the same as "soul" - intangible, immeasurable, unknown entity with scientifically unknowable properties.
In order to bring it from the realm of metaphysics (matters of souls, virtues, etc - read Thomas Acquinus and continue towards antica via Augustinus to better understand what metaphysics is and how it is different from scientific knowledge), you have to propose both a full hypothesis on how this "brain as a receiver" works, and a set of reproducible experiments to show your theory to be true.
Jesus Christ, I never thought that I, a person with no degree, will ever explain the basics of epistemiology and scientific method to a PhD on the internet...
Or simply, why do people behave differently when they are drunk? I mean, it's only their body that is drunk, not their soul (or wherever the mind supposedly resides), so how can alcohol have an impact on the mind?
Why does bending my TV antenna have predictable effects on the signal I receive? Why doesn't this imply my TV signal is produced by the antenna instead of received by the antenna?
Answer these questions, then apply your answers to your questions.
The act of forgetting is itself interesting. How is the information removed from the immaterial mind, and why things like having enough sleep have an impact on how much the immaterial mind remembers?
I still fail to see how these sorts of arguments show the mind must be physical. We have many examples of interfaces, where damaging the interface can impact the transmission, but does not thereby entail the interface is the transmission.
On the other hand, why do amnesia victims sometimes regain their memories, and even more(!), after brain damage if the mind is just the brain? Why can people live normal, even high performing lives, while missing most of their brain if the mind is just the brain? How can we explain out of body experiences, where the person learns information they cannot have learned any other way, if the mind is just the brain? How can consciousness arise from non sentient matter? How can we think about immaterial, abstract concepts if mind = brain?
In my opinion, the arguments for mind = brain largely depend on logical fallacies, as explained above. And, there are also phenomena that are very difficult and even impossible to explain if mind = brain is true. Additionally, I haven't gotten into this, but there are a number of thought experiments that indicate mind = brain is logically incoherent. So, the most parsinomous explanation is that mind != brain.