The GTX modder offers a quite practical script for Farming Simulator 22. It allows to synchronize the cruise control between vehicles that are close (within a radius of 25m). This mod can come in handy solo if you have a harvester/forage harvester fleet and want to sync alongside with your tractor. In this specific case, pressing the SHIFT + 4 keys will adjust your tractor to the forward speed of the harvesting tool, including during headland manoeuvres. It's not an essential mod, but if you're still looking for even more simplicity, it will do the job.
Less than a minute