Binaries of the dada2 R package are available through Bioconductor.
if (!requireNamespace("BiocManager", quietly = TRUE))
install.packages("BiocManager")
BiocManager::install("dada2", version = "3.9")
See the Bioconductor install instructions if issues arise. In particular, to get the newest release of the dada2 R package through Bioconductor you will need to have the current version of R installed.
The dada2 R package source code is maintained at GitHub: https://github.com/benjjneb/dada2
All dada2 R package releases are available through the GitHub Releases page: https://github.com/benjjneb/dada2/releases