If it was extracted from MHRB, there is no chance there is any 5-MeO-DMT in there since it was never detected in that plant.
Also, yeah I am sure that DMT can turn greenish with PDMAB-TS (AKA hoffman reagent)
Here's a video comparing both (first with ehrlich then with hoffman reagent), it is made in TLC plate so not exactly the same but just so you get an idea of how they both change to green except 5-MeO-DMT is much darker/stronger change.
You shouldn't be worried at all, and neither should be worried about asking questions, we're happy if we can help, and we're glad people like you are doing their research before consuming these substances.
What dosage are you considering to consume in your analogue aya?
Good luck!