Black Text Not Displaying as CMYK in Acrobat Preview

Hi everyone,

I'm facing an issue when exporting a file from InDesign to PDF and would like to ask for your help in resolving it. In InDesign, I have set the black text to be 100% black (C=0, M=0, Y=0, K=100). However, when I open the PDF in Adobe Acrobat Pro and check the output preview, the black text is showing as DeviceRGB instead of CMYK.

Here are the steps I've followed:

1. Configured my document in InDesign to CMYK color mode.
2. In the Swatches panel, I set the black text color to C=0, M=0, Y=0, K=100.
3. During PDF export, I used the following settings:
   • Color Conversion: Convert to Destination (Preserve Numbers)
   • Destination: Working CMYK - U.S. Web Coated (SWOP) v2
   • PDF/X-4:2010
   • Disabled Optimize for Fast Web View
4. In Adobe Acrobat Pro, I checked Print Production > Output Preview and the black text appears as DeviceRGB.
5. In the Transparency Blend Space settings, I selected CMYK.
6. In the Appearance of Black settings, it's configured to "Display All Blacks Accurately".

I've watched several tutorials and checked various settings, but I still can't resolve the issue. Has anyone faced this problem or knows what might be causing it? Any help or suggestions would be greatly appreciated!

Thanks in advance.

Best regards,