I can’t find a working app for my iPhone. Maybe someone here can suggest a good one for iPhone/LG pairing?

Yeah, connecting Apple products to LG phones is quite a hustle. But that’s my case and I don’t have any problems with it. I already found an app that actually works. Just go for the google cast https://vk.cc/ctjZld . Visit the website and you will find everything you need there. Take a look.

Looks good! Thank you for sharing it here. I will install and try it now.