I've briefly spoken to Paul here at MiniDebConf Hamburg. It might be
reasonable to rejectlist r-cran-httr2 on riscv64, but please
consider increasing the r-cran-httr2 tests internal timeout first.
Indeed, the failure rate on risc64 is way higher than on other release
architectures. The tests run also 10 times slower, which is a lot. I
am not familiar with risc64, but if the usage pattern of this
architecture is narrower than amd64 and arm64 and does not include
scientific computing, it may make sense to just remove all
team-maintained r-cran-* packages there too, as it is not supported
upstream. Risc64 users who just want to perform HTTP requests with a
script language have better alternatives such as Perl or Python.