Casting a collation in an ORDER BY ... COLLATE

I’m trying to cast a string value to a collation name without success. My suspicion is this isn’t possible
based upon the error message. But perhaps wiser heads than mine have a suggestion on how to do
this?

cldr_sql=# select * from models order by name collate 'en-x-icu'::regcollation;
ERROR: syntax error at or near "'en-x-icu'"
LINE 1: select * from models order by name collate 'en-x-icu'::regco…

Utilmately the objective is to interpolate the collation value into a prepared query so
this is just the first step to validate that casting a COLLATE name  is possible or not.

Suggestions and ideas most welcome.