Dandelion BIP: https://github.com/bitcoin/bips/blob/master/bip-0156.mediawiki
The article that I read about Dandelion++: https://www.monerooutreach.org/stories/dandelion.html
It mentioned that Dandelion++ was developed for Bitcoin. So do we have a BIP for it and plan to implement in Bitcoin Core?
Though Dandelion++ was explicitly developed for Bitcoin, it was recently applied to Monero by developer Lee Clagett (vtnerd), with testing and review by developer moneromooo