Automator and combining PDFs

I want to automate the combining of PDFs. I had one such device once. It has disappeared somehow. I think that I had saved it as a workflow. Since then I have changed machines and operating systems. It's gone now. So now I am starting from scratch.

From what I read online, I am thinking that saving my Automator script as a Quick Action might be worth trying. I found a two drawbacks. The smaller problem is that I can use Quick Action as a Service only within an open window. Using an open window can be inconvenient. The bigger problem is that the "Combine PDF" tool appears to combine the PDFs in that window in alphabetical order. I want instead to combine them in chronological order, and that order does not manifest itself in the names of the individual PDFs. I found that within the "Combine PDF" tool I cannot move the individual files around as I can in, say, Preview.

I do not want to retitle the files, because those names mean something.

Is there a way to rearrange the PDFs within Automator to combine in the proper order?

And would some other form, such as "Application" or "Workflow" accomplish my goal?