Project Oakdale - Datas - Power Platform Community

Hello, We have an E3 licence (Not premium) and are using PowerApps mainly with SharePoint. We are very interested with the opportunity to use Oakdale features, with the ability to have a stronger relational database in Teams. My question : is it possible to export those datas created with Oakdale or are they "locked" ? If these datas are no longer accessible (at least exportable somewhere), it may be difficult to explain to the IS/IT that this is the right direction. Thanks a lot for your advices.