>>54022278It's possible but it seems unlikely because there were no consistent contemporary descriptions of it.
The Templars did keep foreign religious relics from the crusades and there were reports that they committed heresies as initiation rites, purportedly as you say to train members in case they were captured and tortured, all of which was used to legitimize the french king's accusation, but by all accounts Baphomet the pagan idol was made up by the inquisition.