I’d generally heard ‘laundry stripping’ used to refer to a vinegar soak/rinse, followed by a baking soda cycle to further neutralize. The idea being laundry soap/detergent is basic and some things build up and don’t dissolve. Added borax was an alternative ‘laundry booster’ that made this unnecessary, as I’d heard it.

But, it sounds like there’s some variability to how the terms are used and for some a borax rinse is a stripping process. Understandable, as the end result is pretty much the same.