Would commonly used post-hypnotic suggestions given during my subconscious channeling be acted on and could this also be a way to further validate its therapeutic potential?

This is probably the simplest and most effective way to create a consequence of a channeled message being delivered to another person. The ability to see the effects of healing are more subtle and take place over time in many cases, and will require multiple sessions to produce measurable benefit. This proposed experiment would be simple and straightforward, but could bear fruit, and would be way to get a quick sense of things, and it would add to the credibility of the enterprise. And that is very important in creating sufficient interest to warrant more intensive investigation which would be costly. So having a simple experiment of this kind show its effectiveness, could be used to encourage someone to do a more serious study of psychological help and healing based on your channeling.