peak_refresh_rate : Forcing this to 90 or 120 (depending on your hardware) can eliminate stuttering caused by dynamic refresh rate switching.
If you want a alternative first: Enable Developer Options → set all three animation scales to 0.5x → enable Force GPU rendering → disable HW overlays (toggle off). That alone fixes 80% of UI lag without editing the database. setedit lag fix verified
Here is a breakdown of whether this method lives up to the hype. peak_refresh_rate : Forcing this to 90 or 120