some figs need pollination. and only thing that will pollinate fig is fig wasp, unless you want to try manually pollinating the figs. and in US, fig wasps are only in certain area of CA. so, if you have wron type of fig tree.. kind that needs pollination, the figs will drop.
other issues can be you have type that's known to drop figs, you have one that requires certain amount of heat and sun and it's not getting enough, or the tree is somehow stressed and can't hold on to the figs.
welcome to the forum.