According to the search results, the following PS5 games support 120Hz:

• Atomic Heart
• Borderlands 3
• Bright Memory: Infinite
• Call of Duty: Black Ops Cold War
• Call of Duty: Modern Warfare 2
• Call of Duty: Vanguard
• Call of Duty: Warzone 2.0
• Cyber Shadow
• Destiny 2
• Tony Hawks Pro Skater 1 + 2
• Turok 3: Shadow of Oblivion
• Uncharted: Legacy of Thieves Collection
• WRC 9
• Ys VIII: Lacrimosa of Dana
• A Plague Tale Requiem
• Agent Intercept
• Azure Striker Gunvolt 3
• Black Desert Online
• BloodRayne Betrayal: Fresh Bites
• The Touryst
• Tiny Tina’s Wonderlands
• WWI: Verdun

Its important to note that not all of these games default to 120fps, and some may simply include an option for high performance. To take advantage of 120fps games, a TV or monitor with an HDMI 2.1 port that supports 120Hz is required.