Hi Josh,
Thanks for reaching out.
Can you tell us how your users login today in OpenVPN? Do they login with OpenVPN credentials or do you have LDAP connected to OpenVPN?
We support two factor with OpenVPN using RADIUS authentication. You can check the document below.
https://www.miniorange.com/2-factor-authentication-for-vpn-login
Also, if you want we can setup a demo for you or setup a call if you want to talk.
Thanks,
Kalpesh