Found this in 887 visa description:
https://immi.homeaffairs.gov.au/visas/getting-a-visa/visa-listing/skilled-regional-887#About
Processing times
We assess applications on a case-by-case basis, and actual processing times can vary due to individual circumstances including:
whether you have lodged a complete application, including all necessary supporting documents
how quickly you respond to any requests for additional information
how long it takes to perform required checks on the supporting information provided
how long it takes to receive additional information from external agencies, particularly in relation to health, character, and national security requirements
how many places are available in the migration program