Using Pro 3.5 I find that adding a 3d scene with labels etc to a layout results in a blurry mess in an exported PDF or JPG.
It appears as if the labels are rendered to a bitmap and merged into the scene as part of a single image inside the PDF.
Being able to either specify the label render quality or have it done better by default would be great.
Map in layout to jpg:

Scene in layout to jpg:

SBS:

Both using the same layout page size, same 300dpi and 95% quality.
My workaround now is to export the image without any labels and add them manually in a graphics tool. Yay for being productive in 2025.