brandiwoodson At this time we do not have a dedicated power automate connector. Power automate supports calling MS Graph API, so you may be able to leverage this API via that.
KeesHuizer I am unable to repro the issue, I see the owners added correctly to the community - as admins and members. Can you please confirm if you are still able to repro the issue? If so, can you please raise a support ticket sharing the steps to reproduce?
Regarding adding members directly to communities, you are correct, it is not supported at this time. You may use Add members - Microsoft Graph v1.0 | Microsoft Learn to add members to the M365 group connected to the community and the community membership will be automatically updated. Thanks!