This applies to all software. You didn't make the monitor your app is being displayed on. Stop taking credit for the compiler that made your code runnable, etc.
What a crazy era we live in where people can finally take full credit for someone else's work, because that someone else is an algorithm that even encourages you to do so.
Komai is explicitly presented as a fork of Nheko. We credit the upstream project, major libraries (matrix-sdk) and assets (iconsets, etc.), and are open about using AI during development.
I’m not claiming sole authorship or pretending Komai was created from scratch. It's built on existing work (done by various humans over many years) and we're being transparent and thankful about it.
Disclosure: I've spent multiple months working on Komai (with AI and other humans).