There a list of what era each of the tracks came from? Looked for one a while back but couldn't find one with everything in one place
Not an official list, but I could break it down based on what I've read.
"No Bad Energy" and "Adult Film" were made from sessions with Swizz Beatz in Los Angeles in 2016. "Echo" also came from these sessions.
"Vernon Family" and "You Mean the World to Me" were from HHID.
I don't know when "Jarreau of Rap" was made. Could have been made specifically for LT2.
"Lost Freestyle," "Royalty," and "Beautiful Life" were from Life is Good. Nas actually went and added a new verse to "Lost Freestyle," and the hook to "Royalty" has origins from a song called "No Such Thing as White Jesus." Frank Ocean originally performed the hook, but the song got lost.
"Tanasia" and "Highly Favored" were made any time between 2016 and 2018. Nas said in an interview that his next album after Nasir was going to have RZA and Swizz as producers, so these songs most likely came from sessions for it.
"Who Are You" and "Queens Wolf" were from Untitled.
I have no idea when "War Against Love" was made. Could easily be a LT2 exclusive.
"The Art of It" was made in 2009/2010. Nas mentions his divorce to Kelis as a current event and says that he's 36.
"It Never Ends" and "Queensbridge Politics" are LT2 exclusives. Nas said he had to get Alchemist for the album. And apparently, Pete Rock originally made the beat for "Queensbridge Politics" in 1990.