I see in your signature that you have all expansions including DLCs. So the only reason I can imagine why they are not visible in multiplayer list is that something needs to be completed before they get unlocked. Maybe BAF campaign coming with DLC version only.
Not entirely related, but atleast Harvest Red and Operation Arrowhead campaign missions appear in multiplayer mission lists only after they are completed in campaign side.
Have you guys completed BAF campaign? If I remember correctly all official expansions bring at least one campaign with them. Correct me if I am wrong.
The "Campaign" and "endmission" cheat did not solve the problem. Only the PMC and ArmA II campaigns show up now. BAF missions "CTI 16 Crimson Lance" and "CTI 24 Operation Serpent"
are still not available.
BIS should atleast make a list of included missions in DLC or patch readmes when they add new missions. Looks like bad marketing if people do not know what they get for their money. Writing something like "Includes new singleplayer compaign" is not enough if new separate COOP, DM, CTI or what ever missions are included.