At this time, Mixer cannot export directly to UE5 because Mixer does not convert files into .UASSET files utilized by UE5.
However, you can export from Mixer to your disk using Mixer's Export Settings tab, which we can utilize to export into a UE5 project. When using this method, you'll need to create material instances and assign your textures manually.
Within UE5, open your Content Drawer (CTRL + Spacebar), and in the "Content" folder, create a new sub-folder where you want your Mixes to be imported to your project. e.g. "Mixer Imports."
In Mixer, click on the Export tab in the top-right corner of the UI. In the Export Target menu, select "Custom," and navigate to the newly created folder within your UE5 Project, e.g., "Mixer Imports."
If you're unaware of where this folder is located on your disk, you can go back to UE5, right-click on the Content folder and select "Show in Explorer." Ensure you enter the newly created sub-folder, e.g., "Mixer Imports."
When your Export Settings are finalized within Mixer, hit the "Export to Disk" button. Within UE5, you'll see the following pop-ups. Please select "Import":
This will export your textures from Mixer directly into UE5. To create material instances for your Mixer Imports, go to the "MS Presets" folder in your Content Browser and search for the Default Material "M_MS_Default_Material," select "Duplicate," then move the duplicated master material into the MixerImports folder. Then, right-click on the M_MS_DefaultMaterial and select "Create Material Instance":
Double-click the Material Instance to open it, and assign your texture maps to their designated slots:
Save your Instance, then drag and drop from Content Browser as needed. Please note that you must create Material Instances and assign textures for each imported Mix.
In case of any issues, please contact firstname.lastname@example.org for assistance.