Why don't "statistics" options appear in the job's command?
Because you updated the default parameter in the procedure call. This means that if you call the procedure without these parameters, E.G.
that these default parameters @UpdateStatistics = 'ALL' & @...
You can just add the parameters to the job, it will just execute the SQL statement.
This is the official documentation, any parameters here you can add to the procedure, it also has some examples.
Ola hallengren site
For example this is an example that I have running now:
@Databases = 'USER_DATABASES,
@FragmentationLow = NULL,
You can see the progress of vacuum with
select * from pg_stat_progress_vacuum;
Here are some tips for vacuuming large tables
You do not have to wait too long for autovacuuming