OpenVpn + 2FA SMS

[Epigraphe]

Hello.
I need advice or recommendation on the possibility of implementing the following scheme:
The user connects to the VPN and uses SMS as the second factor.

I set up PrivacyIdea as 2FA service

Hence the question - did someone implement the VPN + 2FA sms scheme?
I would like to give the user the opportunity to connect to the VPN as simply as possible.
That is, he logs in under the login-password from AD, receives SMS and enters the code in some opened window in the client.

As I understand it, the openvpn client can open an additional window for entering an SMS code, which is why I chose this scheme from the very beginning.

Is it possible?
Maybe someone implemented this and can share the experience?

[Epigraphe]

I solved this problem, the topic can be closed.