Hi Debbie-lee,
Sorry the CHP means the Community Herbalist Program. There is a Medicinal Mushrooms course in the Community Herbalist Program and within that, double extractions are discussed.
Depending in who the mushroom capsules are coming from, these may be pre-extracted and dried, so made more bioavailable and therefore you would not need to take as much. But the powder likely is just ground raw mushroom, so it would be better if it was processed before you take it- i.e. the double extraction.
For Fire (or burn) morels, I do not know for sure specifically about them but here’s a nice article about morels in general and I imagine they would share some similar medicinal components: https://pmc.ncbi.nlm.nih.gov/articles/PMC10063854/
Warmly,
Benna