We need to be able to mass restore archived records...is that possible? If so, how?

[AllenTschumper]

We are moving, or already have moved to a CSM instance of service now and are soon to retire our old instance (end of year),

Now we need to move old data over from the old instance.  I want to move our archived data.  I am finding that I need to restore the RITM data to be able to retain the variables on them.  If I don't restore, things do not work as needed.  

But really, I just want to know if there is a way to mass restore archived records and NOT have to do them one-by-one.  Which the latter is no feasible with having hundreds of thousands of records.  I am assuming we'd need a script.  

Anyone able to do this?

[priomkhan]

Can you use new GlideArchiveRestore().restore(gr2.sys_id); in a scoped application? It giving me below error:

[Snowdevloper]

To restore records back man table fm_expense_lines from sys_archive_log  with the help of filter like created (sys_crerated) after 2020-05-03 
Note: For my case, the "sys_archvie_log" table is having crores of records  so that the reaon i don't have option to check restore from the "sys_archive_log" table.

I am trying with the fix script bit its now doing the restore

restoreRecords();
var archr = new GlideRecord('ar_fm_expense_line');
archr.addEncodedQuery("sys_created_on>javascript:gs.dateGenerate('2021-05-03','23:59:59')");
//archr.orderByDesc('number');
archr.query();
function restoreRecords() {

    var archiveGR = new GlideRecord('sys_archive_log');
    archiveGR.addEncodedQuery('to_table=ar_fm_expense_line^restored=NULL'); 
    archiveGR.query();
    while (archiveGR.next()) {
        new GlideArchiveRestore().restore(archiveGR.sys_id);
    }
}