If you want a compatible, alternative, or replacement pen for your Remarkable 2, I have tested them and here's what works. It will also save you money.
reMarkable 2 tablet review: A smart paperlike notebook that wants to replace pen and paper - BBC Science Focus Magazine
Remarkable – Sanders FX
Stylus : Remarkable (2) Marker plus
The Best Remarkable 2 Stylus Alternative : A Detailed List BorednBookless
Proof reading on the Remarkable 2 – David Hewson
reMarkable 2 Notetaking Tablet with Marker Plus - Micro Center
Best accessories for reMarkable 2
Markers and Marker tips for reMarkable 2
Has anyone used a metal nib with their ReMarkable? Good or bad results? : r/RemarkableTablet
Expert Guide To The Best Scanmarkers and Scanning Pens - Accessory To Success