Playing on your PC but using your iPad as an controller

I’ve been having an wonderful experience in playing Battle Royal gaming genres on my iPad Pro recently, that I feel I’m not physically disabled. The iPad and most tablets have changed my life.Controlling my avatar on my iPad is so smooth and easy, my cousins are freaking out how I’m getting better and better playing. The track wheel and shooting function on screen are amazing (not perfect, but good enough).I’m now been digging around, but surprised, that there’s hardly any device or app out there that can allow me to play on my PC using my iPad as an controller? Any of you have one?? I’m so so eager to find one🙏😞..I’ve been dreaming to play COD Warzone efficiently