When you open the Workshop, there is Ammunition section, you can find three types of ammunition - Thermal, EM and Kinetic types - all nine craftable ammunition types.
If one or more of your ships have them equipped, there will be no displayed tags that tells you on which ships they are.
This was possible before, if you hovered with your mouse pointer on ‘installed:’ area. Then a tag appeared, showing you all ship names that are using such ammunition.