How do you export a transparent image frome pixlemator and keep the transparency on ipad

HI my name is RedstoneGambiler6 and I wat to be a professional YouTuber so I am making a video overlay but whean I export it it will no longer have transparent features could you help and pixlemator is the only editing software I have and I don't plan to change could you help and here is the image

AAnd if you past it anywhere it won't be transparent thanks for reading and plz reply asap