Amavis doesn't get the right spam score values from policy table in MySQL

[Damian]

> Is this temporary fix safe to use

I have not seen feedback on Gitlab or amavis-users that it lead to problems.

> until a new version of perl-DBD-MySQL is released for RHEL9 (and AlmaLinux9 and others)?

Unless some changed their mind, there won't be a fix in perl-DBD-MySQL.
Instead you can try with perl-DBD-MariaDB and DBI:MariaDB as *sql_dsn.