Timescale_post_restore() not found?

Am trying to do a self hosted migration by following the instructions here and I’m getting the following error:

ERROR:  function timescaledb_post_restore() does not exist
LINE 1: SELECT timescaledb_post_restore();
HINT:  No function matches the given name and argument types. You might need to add explicit type casts.

Both instances (source and target) are on Postgres 15 and Timescale 2.15.1.

Does restarting Postgres services bring all the timescale triggers back online if I can’t run post_restore? Does all the other Timescale bits get re-enabled?