Yes, it does. You can use the Metric API v2, for example:
All ingested metrics will have the timeframe based on the time you send the data. You can also include custom data as a dimension too, but Dynatrace will use the timeframe based on the date you sent them.
The "line protocol" format allows you to ingest multiple data points with timestamps in one request.
It looks like the timestamps have to be within <-3600000;+600000> ms of current time like the dynatrace_ingest command.