The phrase "to become available to someone" means that something or someone is now accessible, reachable, or within the grasp of someone. Full definition
Only a handful of titles become available to download in the first week of 2018. (nintendo-okie.com)
This is still a very new phone having only become available to buy quite recently. (androidheadlines.com)
Meanwhile, technology may change the game as secure mobile transactions using a smartphone to access a bank account or line of credit become available to consumers at the coffee counter. (creditdonkey.com)