That's not true, there's been a working dynamic fps mod out for years for version 2.1.0 available from here:
https://github.com/masagrator/Xenoblade2DynFPS. By targeting 3.0.0 for your HD resolution mods, you make it impossible to have proper HD resolutions and 60 fps at the same time. There are other essential mods like the patch for the glowing icon increasing in size constantly in Torna: The Golden Country that only work on 2.1.0. Please consider making a version for 2.1.0 so that users of older mods don't have to disable them to use the HD mods