This is how it works where I live from a legal point of view too. If you “show up” (in-person or remote doesn’t matter) to your full-time job and are “available” for work but they don’t have enough for you, legally you must be paid for your full number of hours (your entire salary). You are paid for your time, not your results. You keep your job by delivering good results, however, since that’s a different matter.