filtering key from a jsonb column that is not null

select first_name, last_name, schedule as "Thursday" from "Employees"  where schedule#>'{4}' is not null

supabaseClient.from('Employees')         .select('first_name,last_name,schedule')
            .not('schedule#>{4}', 'is', null)

supabaseClient.from('Employees')    .select('first_name,last_name,schedule')
            .not('schedule->>4', 'is', null)