Subtitles not showing up in VR-Build

'ello, I am trying to include subtitles in an interactive VR-Film-Experience, but unfortunately they don’t show up in the final build on my Quest 2. The curious thing about this is, that they are displayed in the Game-View, if I use an XR Device Simulator. (Yes, I deleted it from the Hierarchy before building).
To get the .srt-files into Unity, I am using EasySubtitles and have set them up (hopefully) in the correct way.

I am using Unity LTS2022.3.47f1 and an Universal 3D Project.
My “Subtitle_Empty”, “XR-Canvas” and “Subtitles (TMP)” are all Untagged and on the Default Layer.
The Render Mode on the XR-Canvas is set to Screen Space - Camera, and the Main Camera (Camera) is selected as the Render Camera. Tho all of the Render Mode Options kinda worked in the Game-View, but not the Build on my Quest 2.

I sure hope, I am just overlooking something totally obvious. If you need any additional information, please let me know!