I would contact the embassy with your ref number and ask for an update. Cambodia can take 4-6 business weeks. If you were asked for additional docs, then the approval time is reset to zero.
That should not be an issue. If your company is going to renew your contract that can be noted in a letter of employment. I did that with my Taipei application
Sponsorship is primarily for a spouse and for kids. She will probably do better applying herself via soft power option if she does not have a remote work job.