I've never had a problem using Vsync personally. Others have reported issues in specific titles. Particularly eSports titles when graphics quality is purposefully set low in order to maximize frame rate. Maybe an explanation of purpose behind your question?
Also you state a refresh rate (144Hz) but no mention of resolution or quality or game titles, to make a determination whether a RX 6700 XT would even benefit from a frame rate cap, much less enabling FSR.
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