Sounds like what Jorge Spräve (the slingshot guy on Youtube) did. He developed a mechanism that could be attached to any bow, with multiple arrows stored for rapid fire, draw assist, holds the string back at full draw, and has a trigger mechanism. Apart from the draw assist (which used slingshot bands), everything was theoretically producable during the middle ages, it just was never invented

This kind of happens accidentally sometimes. Like it turns out you can use pond scum as a very basic medium for some very shitty but functioning solar pannels, we could have invented solar power as soon as we could work copper and tin if it werent for the whole needing to know all the reasons why you would even want to do that.

The concept, while interesting, doesn't make a lot of sense. Prior to the industrial revolution (and also all throught the beginning of it), most inventions weren't all that difficult to make. With just a handful of techniques, you could go quite far when starting out with stone-age technology.

If you take the information from a handful of Wikipedia pages to the stone ages it would take maybe a few years or decades to go from stone-age technology to steam engines.

Up until the early industrial revolution the limiting factor for technological innovation was mostly information.

So when going back with the knowledge of all the innovation that happened since the stone ages it's quite easy to make basically anything happen from there.

Remember, there's a patent for the crank. That means, we had a fully-fledged patent system before we came up with the idea to put two right-angles into a rod.