Can Arduino IR Recievers Detect Signals from IR Flashlights?
I would say: No, won't work

That's because the IR sensors like the one on the module is intended for remote control. Here's a link to a datasheet of a typical example.

Look at the table on the bottom of the first page, note how there are different types for different "carrier frequencies". This carrier frequency is the "modulation" which is used to detect the IR signal and suppress other IR sources like lights, the sun and the light from IR LEDs that are not modulated, like from an IR flashlight.

The light from the IR flashlight is not modulated but constant and will thus be ignored by such an IR sensor. It is designed that way so that they're more sensitive to the IR coming from a remote.