The X10 app is not ready for homey 2.0 yet. See this post
Yes it does, see screenshot below. Under “Apps” the X10 app should be available. Its not there in V2.0
@nattelip is working on it, more info in the post that is linked above
Its working in Homey 1.x
But X10 is not in the Apps list under “actions” in the new app yet
SUGGESTION: for a workaroud, create new X10 device and name it the house code and number you want to send. Now you can add the device in the “when” and switch it on or off. This will make homey sent the X10 RF code