Variable Refresh Rate support for PS5 is rolling out this week - PlayStation.Blog
Quote
In the coming weeks, the PS5 versions of these titles will receive game patches enabling VRR support:
Astro's Playroom
Call of Duty: Vanguard
Call of Duty: Black Ops Cold War
Destiny 2
Devil May Cry 5 Special Edition
DIRT 5
Godfall
Marvel's Spider-Man Remastered
Marvel's Spider-Man: Miles Morales
Ratchet & Clank: Rift Apart
Resident Evil Village
Tiny Tina's Wonderlands
Tom Clancy's Rainbow Six Siege
Tribes of Midgard
Quote
As an added option, you can also choose to apply VRR to PS5 games that don't support it. This feature may improve video quality for some games. If this results in any unexpected visual effects, you can turn off this option at any time. Please note that results may vary depending on the TV you're using, the game you're playing, and the visual mode you've selected for a particular game (if it supports multiple modes). For more details on VRR settings, check out this page: How to enable and adjust 4K resolution on a PS5 console