Something that will help, though I can see will be a certain amount of effort (I remember converting PDL from Travis to GitHub Actions (GHA)), will be to use GHA for DBI, better.

The current CI config is somewhat minimal: many Perl versions, but that's all: https://github.com/perl5-dbi/dbi/blob/master/.github/workflows/test.yml

A good example that has lots of weird and wonderful DBDs is DBIx::Class's, but that's only on Travis, so would need updating to GHA; the main Travis config is at https://github.com/Perl5/DBIx-Class/blob/maint/0.0828xx/.travis.yml, which calls various scripts in https://github.com/Perl5/DBIx-Class/tree/maint/0.0828xx/maint/travis-ci_scripts.