UGREEN Airplane Bluetooth 5.2 Transmitter Adapter $27.99 + Delivery ($0 with Prime/ $59 Spend) @ UGREEN via Amazon AU

Got refunded from the $5 kmart 5.3 transmitter deal because they ran out of stock =( so I ended up finding this one online at amazon
Note only single 3.5mm jack, not sure if it comes with adaptor for planes with two 3.5mm jacks