How to find Reused R values
This is list of many repeated random (ephemeral) keys used in bitcoin: https://dev.to/maelvls/why-is-go111module-everywhere-and-everything-about-go-modules-24k

AFAIK ever since around 2015, nearly all bitcoin wallets use RFC6979 (https://tools.ietf.org/html/rfc6979) which is a deterministic algorithm to get the ephemeral key instead of using an RNG so I highly doubt you'll find any recent ones (after around 2015)