Sure, tailoring your resume for a specific job is pretty standard. Perhaps an LLM that has access to your resume, along with loads of documentation on what you have previously done would provide for a much better automation process.

It could read the job spec, then tailor your application with information that is actually true. Starting off with a company with information that is false is not a great way to start a (hopefully) long relationship.

FWIW, we review every application we receive on the freelancer sites and do not use automated filters.