Extension "plpythonu" is not supported by Amazon RDS

I am trying to install extension "plpython3u" that supports writing python in postgresql.

EXTENSION plpython3u;

Error: > SQL Error : ERROR: Extension "plpythonu" is not supported by > Amazon RDS Detail: Installing the extension "plpythonu" failed, > because it is not on the list of extensions supported by Amazon RDS. > Hint: Amazon RDS allows users with rds_superuser role to install > supported extensions. See: SHOW rds.extensions; Can you recomend a solution? We are running the following version of postgresql: > PostgreSQL 12.7 on x86_64-pc-linux-gnu, compiled by gcc (GCC) 7.3.1 > 20180712 (Red Hat 7.3.1-12), 64-bit