Does anyone know of a homebrew tap?

[ethanuppal]

Is there a homebrew tap bundling this as a cask?

[kova1max]

No - there is no Homebrew tap or cask for NX2Apple right now, and the app can't go into the official homebrew/cask as it is shipped today.

Homebrew's cask rules require apps to pass its Gatekeeper checks and not need Gatekeeper to be bypassed. The release NX2Apple-macOS-arm64.zip is not signed with a paid Apple developer certificate (that's why the README tells you to right-click > Open the first time), so it would be rejected until the app is signed and notarized.

The Brewfile in the repo root is a different thing: it only installs the build tools (xcodegen, zstd, spirv-cross, glslang and the dotnet-sdk cask) for building from source:

brew bundle --file=Brewfile

For the app itself, the install path is the one in the README: download NX2Apple-macOS-arm64.zip from the latest release, unzip, open once with right-click > Open. After that it updates itself from the signed latest.json each release publishes, so a cask would not add much beyond the first install anyway.

Source, if you want it: README.md "Install" section and Brewfile in this repo, release v1.2.3 assets, Homebrew's docs/Acceptable-Casks.md (brew 7.0.12), and formulae.brew.sh (no nx2apple cask).