I downloaded all 3 Jellysquid mods (Lithium, Phosphor and Sodium) and this mod: curseforge.com/minecraft/mc-mods/speedrun-timer-the-best-fabric As far as I know this mod does not provide any cheats and is reliable, but I'm just wondering if it will stop a run from getting verified. Thanks in advance, Astro :)

no, unfortunately, you can't use it because it's a mod. U can always just download livesplit and time your runs through there. The link is on the resources page