Import Saved Windows Event Logs

No, there's nothing in Filebeat for this either.

If you wanted to do some Go development I can potentially see a path that reuses the Winlogbeat code. You could export the records from the .evtx file to XML using the tools in windows. Then write a custom processor (similar to the decode_json_fields processor (source) that uses the Winlogbeat code to parse the XML. Then read the XML log lines using Filebeat and enable your custom eventlog xml processor. The config might look something like:

filebeat.prospectors:
  - paths: ['eventlog.xml']
processors:
- decode_eventlog_xml: {}
output.elasticsearch.hosts: ["http://localhost:9200"]