Example reproducer:

# perl -MDateTime -e 'print DateTime->now()->set_time_zone("America/Sao_Paulo"), "\n";' 

is returning UTC-2 instead of UTC-3 at the time of this report.

Replacing /usr/share/perl5/vendor_perl/DateTime/TimeZone/America/Sao_Paulo.pm with contents of https://metacpan.org/release/DROLSKY/DateTime-TimeZone-2.60/source/lib/DateTime/TimeZone/America/Sao_Paulo.pm#PDateTime::TimeZone::America::Sao_Paulo corrects the issue.

Solution to this issue should be to somehow tie updates to any kind of tzdata update to also update perl-DateTime-TimeZone as the current data is from 2018.