I'm surprised that this hasn't applied yet, because:
On 2020-Apr-09, Peter Eisentraut wrote:
> One thing to remember is that the current situation is broken. While you
> can set index columns to have different storage than the corresponding table
> columns, pg_dump does not preserve that, because it dumps indexes after
> ALTER TABLE commands. So at the moment, having these two things different
> isn't really supported.
So I have to ask -- are you planning to get this patch pushed and
backpatched?
--
Álvaro Herrera https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services