Typst integration on this site is implemented with this library:

There’s a dependency conflict, but it works.

1
└─┬ astro-typst 0.12.3
2
  └─┬ astro-integration-kit 0.19.1
3
    └── ✕ unmet peer astro@"^4.14.0 || ^5.0.0": found 7.0.3

Yay, it’s Typst