Elden Ring forces Vsync on, it can't be disabled in-game, and AFMF won't work with Vsync enabled.
You can try to disable Vsync globally in Adrenalin, Gaming, Graphics, Wait for Vertical Refresh -> Always Off
Ryzen R7 5700X | B550 Gaming X | 2x16GB G.Skill 3600 | Radeon RX 7900XT
Ryzen R7 5700G | B550 Gaming X | 2x8GB G.Skill 4000 | Radeon Vega 8 IGP
Ryzen R5 5600 | B550 Gaming Edge | 4x8GB G.Skill 3600 | Radeon RX 6800XT