when fleet support apache thrift lanage?

Hello!

Even though there is no specific plans to add Apache Thrift in the nearest time, you should be able to configure thrift TextMate bundle in Fleet for the Apache Thrift files highlighting. Please see https://www.jetbrains.com/help/fleet/textmate.html

For the dedicated support, please feel free to file a request in our tracker: https://youtrack.jetbrains.com/issues/FL

Thank you.