Deno has also created a Next.js competitor, Fresh. I found it a few weeks ago and am starting to go through the docs, looks like a good overall concept. https://fresh.deno.dev/
The NextJS team should be working on making NextJS run better with Deno, not the other way around. If the NextJS team doesn't want to do the heavy lifting with that support, thats on them. I think its perfectly reasonable that the Deno folks have an approximate alternative to NextJS. After all, NextJS won't use native Deno idioms for example, it'll always be tied to Vercels' proprietary cloud infrastructure.