Will my current settings from the MOVE B2B portal (including compensation rates per station, alerts like offline status) be kept in the JOYA B2B portal?

Yes, except for the alert settings - you may need to set those up again in the new portal. We're still clarifying the exact details with our tech team.
Will login and multi-factor authentication stay the same when switching from the MOVE B2B portal to the JOYA B2B portal?
Will the access permissions I've granted to third parties in the MOVE B2B portal (e.g. tenants, co-owners, or other users) carry over automatically to the JOYA B2B portal?