Some hosts support the updateHostDisplay method. You could in theory change what getName returns and then call updateHostDisplay , but my guess if that even IF this works in FL Studio, it will not work in most other DAWs.
EDIT: Not what OP was asking, see below.
That would change the name of the plugin, not the track it’s on. Changing the track name is likely not possible, but if it is, it would be through host-specific APIs not provided by JUCE
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