You can actually mimic the 'walkabout' solution featured in cosmic-wandering in Freedom Locomotion VR - by using the grab turning functionality. To activate grab turning, you hold down grip and press and hold the touchpad. The camera then rotates along with the position of your hand, meaning that you can walk from one end of the room to the other - grab turn, keeping your arm by your side, turn around physically, and then let go of grab turning. You end up facing along the same direction on the path in VR (much like the cosmic wandering system) while having the full extent of the room in front of you to continue walking. Repeating this process allows you to walk physically in a much larger space then you'd otherwise have access to.
Indeed, it's actually a better implementation of that sort of system in my opinion (even though it's only a secondary intention of grab turning) - because instead of locking the view to your head, it locks it to your hand, meaning that you can continue to look around freely while turning around, which is useful for seeing where you actually need to turn to next without actually affecting where you'll end up turning to, which can feel quite disorientating.
Despite all this, I don't prefer using grab turning in this manner - the frequent turns in order to cover any reasonable amount of space is both inconvenient and pulls you out of the immersion of VR - even though you get the benefit of actual 1:1 physical movement. This is because CAOTS is more than a good enough solution (at least for me) for covering both large and small distances in VR while still staying highly immersed without much motion sickness to boot.