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Changing the order of the queue or creating a queue without priority

We have a SAAS system with several hundred customers. We use Hangfire for all kinds of processes such as sending an email.
We have a problem with the following scenario:
Customer 1: create 10000 jobs
Customer 2: create 3 jobs

In this case, customer 2 created the jobs a second after customer 1, but he has to wait in the queue for the entire time it will take for the system to generate the processes of customer 1 because the queue looks like this:
job 1 customer 1
job 2 customer 1

job 10000 customer 1
job 1 customer 2
job 2 customer 2
job 3 customer 2

Is there a way to change the existing queue or do something in a different way so that the order in exporting the jobs is:
job 1 customer 1
job 1 customer 2
job 2 customer 1
job 2 customer 2
job 3 customer 1
job 3 customer 2

job 10000 customer 1

I thought of creating a separate queue for each customer but then customers whose name starts with A will get priority over customers whose name starts with Z.
Maybe the solution to this is creating a queue without priority? Is it possible?
If not, is there a way to edit an existing queue or insert jobs into the queue in the middle and not at the end?

You could queue each job with ContinueWith passing the previous job Id. This will create a linear path of execution for the jobs of each customer. With multiple worker threads the jobs from customer 2 would be available in the queue much sooner. This could result in worker threads with nothing do and the batch of jobs longer to complete overall.

There’s no way to have all queues be the same priority, it just isn’t implemented that way.

Trying the manipulate the queue would get rather messy. I would consider a way to prevent the customer from being able to queue 10000 jobs or have delays in the process to create windows for other jobs to fill in.