It is not, but it is not really from a dispensational, or premil perspective either. Sort of neutral. Frank Thompson, if I remember correctly, made copious notes in his Bible/Bibles, and the Thompson Chain is based on that. I think the first one was published in 1907 and they have had 5 updates over the years. The famed Oxford Long Primer also has a chain reference system, but I believe it is set up differently than the Thompson.
This Wikipedia article notes that it is called The Thompson Chain
Reference Bible, not Study Bible. That is a more accurate description/title reflecting what it is.I still have a KJV. Had the NKJV by Nelson with the Signature Series leather binding. I sold it because it was as big as the NYC telephone directory.
https://en.wikipedia.org/wiki/Thompson_Chain-Reference_Bible