If you’re searching for a dual boot guide, see here:
https://remarkable.guide/tech/dualboot.html
If you’re searching for a way to use the Lamy Pen button out of ddvk / rmhacks, see here:
https://www.joshualowcock.com/guide/how-to-install-the-lamy-al-star-pen-button-eraser-hack-on-the-remarkable-2/