Simulation: how to use evm.root and tags in a service provisionning method?

I would like to call instance which is normally called in a service provisioning sequence in the simulation section.
In the method called by instance, i need tags and prov structure:

prov = $evm.root[“miq_provision”]
miq_request_id = prov[“miq_request_id”]

do simulation engine create a fake miq_request_id?

I need to transmit variables and tags though: that i use with prov.get_option and prov.get_tags.

How to do that?