Split specific page from a PDF

I am facing the following problem: I have a 590-page PDF and I need to create a script that looks for a specific record number, cut out the page it is on, and then generate a new PDF with that page. So far, I've managed to extract all the text from the PDF (something very simple). I was also able to generate a new file generated by the page using lib scissors, according to the code below:

let pdf = scissors(filePath)
  .pages(258)
  pdf.pdfStream()
    .pipe(fs.createWriteStream("inscricao.pdf"))
    .on("finish", function(){
        console.log("Success... Exiting")
    }).on("error", function(err){
        throw err;
    })

In .pages(), the number 1 refers to the first page of the PDF. I thought about looking for the registration number, taking the page number that is in the PDF and putting it in .pages(), to cut that page directly. However, I don't know how to implement this logic, or what lib to use. If you can give me a light ...

Thank you very much in advance