tmgmatrix.cisco.com does not have GLC-BX40 listed on the ASA-IC-6GE-SFP-B module, neither it has the GLC-EX but we tested working on Version 9.6(4)40 . So tmgmatrix.cisco.com may not be comprehensive.
Anyone please actually had used the BX40 on the ASA-IC-6GE-SFP-B module ? Many thanks!