Jose,
Those tiles contain normal JPEG markers (SOI, SOF0, DQT) but no JFIF marker (APP/n/) is added. How can I ensure adding this JFIF marker?

you can't, unless you're ready to patch the JPEG codec in libtiff to do that

I should point to https://www.awaresystems.be/imaging/tiff/specification/TIFFTechNote2.txt which mentions:

"Writers should avoid including "noise" JPEG markers (COM and APPn markers).
Standard TIFF fields provide a better way to transport any non-image data.
Some JPEG codecs may change behavior if they see an APPn marker they
think they understand; since the TIFF spec requires these markers to be
ignored, this behavior is undesirable."

Even

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