The last time AEW Dynamite topped 1 million (1,028,000 viewers) was on February 22, 2023. 7,400 at Phoenix:

Orange Cassidy (c) defeated Wheeler Yuta to retain the AEW All-Atlantic Championship (16:51)
The Acclaimed (w/Billy Gunn) defeated The Firm (Big Bill & Lee Moriarty) (w/Stokely Hathaway) (7:12)
Saraya (w/Toni Storm) defeated Skye Blue (3:42)
Jeff Jarrett & Jay Lethal won the Revolution Tag Team Battle Royale (18:32)
Jon Moxley defeated Evil Uno (6:14)
Cagematch gave it a 7.22. Yuta vs Orange averaged 8.16 and Dave gave it ****1/2. Everything else was not looked highly upon.

Before that it cracked a million in Jan 25, 2023 for the Jay Briscoe tribute.

March 1, 2023 (833,000 viewers and never recovered back to 1 million). 4,300 at Los Angeles:

Orange Cassidy (c) defeated Big Bill (w/Stokely Hathaway) to retain the AEW All-Atlantic Championship (12:23)
Powerhouse Hobbs defeated Konosuke Takeshita and Ortiz and Komander and Sammy Guevara and Eddie Kingston and AR Fox in a Face of the Revolution Ladder Match (13:46)
Chris Jericho defeated Peter Avalon (2:29)
HOOK (c) defeated Matt Hardy (w/Ethan Page, Isiah Kassidy & Stokely Hathaway) to retain the FTW World Heavyweight Championship (4:17)
Riho defeated Toni Storm (w/Saraya) (10:07)
Orange Cassidy & Danhausen won the Casino Tag Team Battle Royale (20:47)
6.39 Cagematch. Ladder Match did not crack an 8 on Cagematch, and they didn't like anything else although Dave gave the match ****1/4.