It stopped working on my HY320 as well, FW 20240203
I open the "Miracast receiver" app on the projector, I can't find it from either my Android phone or my Windows PC.
Both are connected to the same wifi network, I think this feature used to work.
Download: https://www.alliwava.com/pages/hy320 Step1: Install allwiner_driver and allwiner_factorest to your computer. Step2: Run allwiner_factorest. Step3: Click icon 'Image' to select HY320 system file. Step4: Click icon 'start'. Step5: Connect the projector to your computer via a USB cable...