Max Shutter speed
Fujifilm X-A10 can shoot continuously at max speed of
6.0 fps and has max shutter speed of
1/4000 sec. X-A10 also has an electronic shutter which can shoot silently at max speed of
1/32000s. One thing to keep in mind is that electronic shutter may cause rolling shutter / jello effects, and also banding issues under artificial light on your images.
Flash
Unfortunately X-A10 doesn't have an external flash shoe so you are limited with the built-in flash.
Focusing
Fujifilm X-A10 features a Contrast Detection autofocusing system. The AF system has 49 points to choose from. Fujifilm X-A10 also features
Face detection AF where it intelligently detects the faces in the frame and locks the focus automatically.