Do you want to represent the concept of your creation being responsive or multiplatform ?
Are you sick of icons displaying an iPhone and iPad with a home button and/or bezels like it it 2007 ? You don't want an iMac to represent the desktop ?
There, I fixed it for you. Enjoy.
Inspired by the one found here : https://www.orangekeymarketing.co.uk/web-design-middlesbrough/responsive-icon/
There is a minimalistic version and a notch version (based on a random chinese Android phone. I don't remember which)
It shows a webapp (PWA versions) or a website, depending on your needs.