In general with plugins you need to define your metrics before collecting them. At the moment the plugin sdk does not allow you to push any metric to Dynatrace that has not been previously defined in the plugin.
As far as I remember, the Dynatrace SNMP plugin collects only basic general metrics from generic MIBs. If you need to collect other metrics, you need to fork the plugin, define the metrics in the plugin.json file, modify the plugin and upload it.
If you are OK with the metrics the plugin already collects, then I'm pretty sure it will work for you as the data is collected from generic SNMP MIBs.