When I export a DWG with On Layers the XREF's are not showing up when my consultants open them in AutoCAD. Compatibility Mode is on. Is there another setting that needs to be turned on. Running 20.02.03.05 (SE).
This may be a little basic to you, but in the Export dialog box under XREFs, make sure that "Ignore" is not checked; if "Export" is checked the Acad user will have to re-set the paths to where they have your Xrefs saved to; if "Bind" is checked the Xref will come in as a symbol only. You may also want to check with the consultants that they have not frozen or turned off the layer that contains the Xrefs. I'm assuming that they have also performed a "Zoom All" as whenever I open an export in Acad or BricsCAD it's always zoomed WAY in and usually doesn't show anything.
Hope this helps! You could also send me an example and I can see what may be happening. PM me if you want to send me something to play with.