I've created a approval for for a library at sharepoint but when the flows runs and there it's concluded the approval, the approval status at Sharepoint keeps on pending. Any ideia how this can be fixed?
I assume that you have enabled the Approval status on SharePoint library. Per my testing, I found that the Approval status at SharePoint library keeps on Pending if you don’t make any changes on the SharePoint Online. It seems that the Approval status can only be updated on the SharePoint Online but not from Microsoft Flow.
I would suggest you submit a request at Flow Ideas Forum for this issue so that it can be considered in the future releases: