Hey,

On a search on google, I found these two blogs for amount of bitcoin that are lost forever and are not accessible anymore.

1. https://fortune.com/2017/11/25/lost-bitcoins/ - 2017
2. https://www.investopedia.com/news/20-all-btc-lost-unrecoverable-study-shows/ - 2019

Is there any latest data to with some sort of proof with the No. of Bitcoin which are lost forever?
Would love to know as according to the 2nd URL, almost 20% of the overall supply is not accessible which raises the scarcity of bitcoin even more.