Custom Types does not work with DOMAIN

Custom type conversion does not seem to work with Domain.

I want to create a custom id field based on int4, but that id field is to be represented as base32 encoded string in javascript land.

create domain appId as int4 not null;
create table app (
	id appId
);

select oid from pg_catelog.pg_type where typname = 'appId'; // returns 17842

const sql = postgres({
  user: 'postgres',
  pass: 'password',
  types: {
   appId: {
      to: 17842,
      from: [17842],
      serialize: (value: string) => parseInt(value, 32),
      parse: (value: string) => { 
         console.log("parsing") // never invoked
         return parseInt(value).toString(32)
      }
    }
  },
});
console.log(await sql`select id from app`) // -> Result(1) [ { id: 1262438631 } ]

the id will still return as an number because the parse function is never invokes.

Now if we change the 17842 (oid of appId) to 23 (oid of int4), then the parse function does get invoked as expected.

Use the SQL and JavaScript reproduction in the issue as the starting point; run it against PostgreSQL and trace why a domain OID bypasses the configured custom parser. Done means selecting app.id invokes parse and returns the base32 string, while serialization still handles the custom id.