Issue with aiven_extras extension when restoring postres dump outside of DigitalOcean

I have a script that backs up our managed PostgreSQL database cluster from DigitalOcean (Attached below). The backup works fine, but I’m having some issues when I try to restore the databases locally.

When I do that I get the following error:

pg_restore: from TOC entry 4819; 0 0 COMMENT EXTENSION aiven_extras 
pg_restore: error: could not execute query: ERROR:  extension "aiven_extras" does not exist
Command was: COMMENT ON EXTENSION aiven_extras IS 'aiven_extras';

I have found the aiven-extras repo, where the only instructions for installing the extension is to run CREATE EXTENSION aiven_extras;. But I suspect that there is something else I need to do. There seems to be very little information about this, however. If I run the command anyway I get:

pg_restore: while PROCESSING TOC:
pg_restore: from TOC entry 3; 3079 18759 EXTENSION aiven_extras (no owner)
pg_restore: error: could not execute query: ERROR:  could not open extension control file "/usr/share/postgresql/14/extension/aiven_extras.control": No such file or directory
Command was: CREATE EXTENSION IF NOT EXISTS aiven_extras WITH SCHEMA aiven_extras;

The (important part of) the backup script looks like this:

# Back up users, roles, etc.
pg_dumpall -h $DB_HOST -p $DB_PORT -U $DB_USER --globals-only --no-role-passwords -f $BACKUP_DIR/globals/globals.sql

# List all databases.
databases=$(psql -h $DB_HOST -p $DB_PORT -U $DB_USER -l -t | cut -d'|' -f1 | sed -e 's/ //g' -e '/^$/d')

# Remove databases that should not be backed up.
databases=$(echo "$databases" | grep -v -E "template0|template1|postgres|_dodb|defaultdb")

# Back up each database.
for db in $databases; do
  mkdir -p $BACKUP_DIR/$db

  pg_dump -Fc -d $db -h $DB_HOST -p $DB_PORT -U $DB_USER -f $BACKUP_DIR/$db/$db.dump
done

And the restore (to a new, local, empty database cluster):

psql -h localhost -U postgres -p 5432 < globals.sql

for db in $databases; do
  pg_restore -d postgres -h localhost -U postgres -p 5432 -C $db.dump
done

Do I need to install the aiven_extras extension before doing a restore, or can/should I modify something in the backup script instead?

Thank you.