Debian Electronics Team - I confirm that Debian Verilator is outdated and not useful for Real Work.
I can also confirm that "modern" versions of upstream Verilator build easily from source in Debian Testing, and work well. For me, "modern" means v4.220 or later -- that was posted March 2022. At the time of this email, latest is v5.004, posted Dec 14 2022. - Larry