You are going to have to define batch of jams
Figure out how much jam is a serving (like a tablespoon)
Figure out how many mg you want per serving
If its homemade jam check your processing temps
I think you have to decarb the shatter first and find a way to bind it to the jam
Xanthan, 210S (xanthan and acacia gum) may help bind the shatter if it turns to oil during decarb (just starting to work on concentrates so still a bit unfamiliar)
Also looking at sugar esters as an emulsifier, the xanthan and 210S are thickeners and you have to be careful or you end up with a gummy like product that is not very good
Not sure if this helps
I make infused simple syrup and just add it to jam, yogurt etc.
The simple syrup is on the left and tincture it was made with on the right
Tablespoon runs 50-75 mg