If none of the settings get you to a clean lock you may be running into the soundbar processing budget. Some bars simply take longer to decode and apply enhancements and they do not offer negative delay to correct it. In that case you either live with a small video delay added on the TV or you pick a bar that supports eARC and offers per input AV sync plus the option to disable heavy processing. In the meantime, use the recipe that brings the delay down the most. Console to TV directly, TV audio Passthrough, console PCM, Game Mode on that HDMI, bar in standard mode, and only add video delay if you absolutely need it.
