Dunno. What I do know is that Robert Kroese’s three volume thriller work-in-progress, Cross-Time Crusade has the Knights Templar at the very centre of the plot. Here is a paragraph from the plot synopsis I quoted in a post about the forthcoming books here on 2022-09-22.
The Knights Templar have been shrouded in mystery since their inception. Who were they, exactly? Why was the order formed? What was their role in the Crusades, and what were their relations with heretical groups like the Cathars, the Arabs and Turks who fought with them for control of the Holy Land, and the mysterious order known as the Assassins? What was the reason for their sudden betrayal, persecution and dissolution? Was there any truth to the charges of heresy or worship of a demonic entity called Baphomet? And most pressing, have the Templars survived in some form to the present day?