Does using a bouncer under close supervision to settle a child go against the Red Nose Australia Safe Sleeping practices?

Red Nose recommends that babies are placed for sleep on a firm, well-fitting & flat (not elevated) mattress.
Any propped or elevated surface is not appropriate for baby to sleep.

There is no Australian Standard for bouncinettes, we are careful to keep up to date with reports of accidents associated with their use. To date, the most frequent accidents associated with bouncinette use are falls and entrapment hazards. Furthermore, deaths have occurred when baby has been placed to sleep in a bouncinette.

We recommend that baby be slept on the back on a firm and flat surface.

When a baby falls asleep in a propped up device the head can fall forwards, pushing the chin down towards the chest. This can lead to the airway becoming blocked and reducing airflow.
https://rednose.org.au/article/bouncinette

While a bouncinette may be helpful for baby when awake, they are not safe for baby for sleep.
Babies in bouncinette must be constantly supervised, even when awake to reduce the risk of injury….... especially when baby is able to pull up, sit up or roll.