Same situation as here Feature Request: Customize Mapping Handlers for Base types

npgsql version: 8.0.3

I am using Ado.net and I need to configure type mapping (string->citext) globally, at npgsql level.
I found the issue but the method it suggests
GlobalTypeMapper.AddMapping(new NpgsqlTypeMappingBuilder(){..}
is not available now.
I've looked through the documentation and found no suitable methods for the configuration.

Can you tell me now is there any possibility to make global mapping of string -> citext types?