Hello,
From our end we can simply state that OpenVPN Connect v3.2.5 build 2468 will work very well on the latest Macbook Pro M1. You will be offered to install Rosetta that makes the compatibility layer. In our testing, we have found no noticeable performance penalty from this, and all functionality works as expected.
However, it might be that something that the migration assistant did caused an unexpected issue, or that the config you have imported is for some reason not correct, or there is some other problem. Since we cannot exchange sensitive data on this public forum, I would suggest you contact OpenVPN Inc. at
https://openvpn.net/support and submit a ticket in the appropriate Connect for macOS section and send us some logs and debug information via that secure channel so we can see if we can advise you further on this issue.
By the way, a future release of OpenVPN Connect for macOS will have a variety available specifically for the new processor type. But the current release works just fine.
Kind regards,
Johan