Hi! 
I bought a portable projector but I can’t connect my Fire Stick to it because it’s a mini HDMI. I can’t mirror the screen either. In fact it keeps asking to connect an HDMI always.
My projector is a PicoPix Micro+ PPX325/INT
Hello!
The best way is to use a mini HDMI to HDMI adapter like this one: https://www.amazon.com/JSAUX-Compatible-Camcorder-Raspberry-Projector/dp/B09MD23K4X/ref=sr_1_1?crid=CXKUX42LV4A7&keywords=mini+hdmi+to+hdmi+female&qid=1681733484&sprefix=mini+hdmi+to+hdmi+femal%2Caps%2C213&sr=8-1
This is a mini hdmi male to hdmi female