Verizon Private Network APNs and MBNs

What is the most appropriate setting for MBN so that our EC25-AFX doesn’t overwrite the class 3 APN with the public VZWINTERNET APN?

We have a VZW Data SIM activated on a private network plan, but instead of seeing the private network APN in CGDCONT 3, we see VZWINTERNET there. We are not certain but are suspecting MBN management might be interfering here. Any other potential sources of the public APN we should be considering?

Should we use the generic MBN? Or disable AutoSel? Or something else