I didn't know what web components were until after I'd released it for React. I was working in a complete vacuum until I put this out there, and then I started to get involved with the community. Before that I was pretty much the only designer/techie I knew. I'm not a professional developer. I'm just a designer who knows enough TS to piece things together.
So having it for React/NextJS isn't an affirmative decision. It's just the only thing I knew how to do at the time. After the first launch last summer I had a couple folks reach out to help port to SvelteKit and Vue, but you know how it is. People get busy.