I'm not sure you will find a log forwarder that is officially available or certified for Solaris.
Elastic has Filebeat and Logstash, both are not officially supported.
Vector from Datadog also seems to not support Solaris, the same for Fluentbit and Fluentd.
Which version of Solaris are you running? Are you running on x64 or Sparc? There is this old post about compiling Filebeat to run on Solaris x86_64, but I'm not sure it still works.
Also, you didn't say what is the sourve of your logs, if it is something coming from Syslog or that you can send to Syslog, then configuring syslog to forward it to another server will work.