Have you tried monitoring the temperatures of the 6800XT while gaming? You can use the AMD Adrenalin software to log this under Performance, Metrics.
If GPU temperatures are high, try using a different Tuning preset under Performance, Tuning. If it is currently configured for Quiet, try using Balanced.
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