Edit: Never mind, a sensor that comes off canβt be reattached.
Places like Vet Shed online have cohesive bandages that could protect the new one. Sometimes they wrap it over taped IV cannulas to stop the pet chewing them out. (Maybe diagonal going under one front leg to over the other shoulder if a figure 8 would put pressure on her neck.)
Also lol they recommend superglue https://www.vss.net.au/videos/application-of-a-libre-sensor.html