I don't know of any listing of the era points but here are some:
1 pt for every other Civ you meet, but not City state.
3 pts for every natural wonder you find first, 1 pt if yer not first to find it.
1-2 pts for first boat.
5 pts for first around the planet, 2-3 points if not first.
4 pts if first to meet every other Civ in game.
3-4 pts for building yer first unique unit.
3-4 pts for building yer first unique building.
2 pts if yer the first one to become the suzerain of a City state.
1 pt for each goodie hut you open.
3 pts for founding a religion
3-4 points for changing to a new government.
2-3 pts for winning a battle against a stronger unit.
2-3 pts for winning a battle with a Great General near by.
1-3 pts for earning or buying a great person.
Don't worry too much about your score vs the AI. Just by the Renaissance period you should have a plan for what type of victory condition you are going for and work hard toward that. Score only matters if time runs out.
Just found this too:
https://www.eurogamer.net/articles/2018-11-16-civilization-6-rise-and-fall-era-score-historic-moments-golden-ages-heroic-ages-dark-ages-dedications-explained-5003Oh, and this:
https://www.reddit.com/r/civ/comments/7w5m3a/ways_to_gain_era_score/