Is Capalai in Semporna under military protection?

My answer is yes.

Since the kidnapping of Semporna on 14, Malaysia has strengthened the security measures in Semporna (I have been there from 13 to 15, and I can see the changes in 13 and 15). On Mabu Island (near Kapalai), there are local garrisons and military outposts on Sipadan Island and Siam Island. In addition, marine police vessels and navy vessels in blue-green camouflage can be seen from time to time on the sea. However, in 15, Malaysia still imposed a night maritime curfew.

Kapalai is a resort hotel, so there should be no garrison. However, Kapalai is in the west of Semporna, far from the southern Philippines in the east, so it should be safe.