Hi @cesq Welcome to the community!
You are sending the data through logstash did you also follow these documents
You did not share your log stash configuration.
Pro tip always send data first directly from filebeat to elasticsearch first and make sure all the data is correct and then put logstash in the middle if you want to.
Follow the filebeat quickstart module first.
Then reconfigure file beat to point to logstash.
Also run full setup not just the dashboards
filebeat setup -e
You do not need logstash, but it's a perfectly valid architecture.
There are lots of topics on this form about the subject.
I think this is one