There are only two events left in Genshin Impact 2.3 before players get to enter the new version of 2.4. The events are Energy Amplifier Fruition and Marvelous Merchandise.
With Primogems as the primary reward, players who are farming for the said currency should definitely play these events when they are available. Based on the previous events, it can be expected that each event grants players 420 Primogems. Here is the date and duration of each event in Genshin Impact 2.3.
The Energy Amplifier
Read more on sportskeeda.com