Question abouth ssl_ciphers Amazon RDS postgres

Hi everyone,

I'm doing some experiments with AWS RDS Postgres and examining the ssl,
rds.force_ssl and ssl_ciphers parameters of the RDS.
If I set the ssl and rds.force_ssl to true, then I would like to set the
ssl_ciphers parameter too, but I see that the parameter is not modifiable.
The default ssl_ciphers value is "HIGH:!aNULL:!3DES" for postgres version
13.
Is there another way to get around this value or am I stuck with the
default value?

Thanks in advance.
Regards
Marian