Iphone XR. Tired of entering password

So on the Iphone 8 Plus there was fingerprint ID that you could use for the apple store, bank apps and the like instead of having to imput your password each time. Of course on the X phones the fingerprint ID is gone. Did something take its place? Is there a setting I can change to not have to enter my password. Assuming it is something simple and I'm just being tech stupid.

Thanks for any help!

Added (1). Let me clarify… I found in the settings under Passwords and Accounts for the autofill… But I only see how to add passwords for websites. I'm trying to figure out for actual apps not addresses in Safari as well as for the App Store.

Face ID is the replacement for Touch ID.

  • What happens after incorrectly entering a PUK code 10 times? My sister brought home an Iphone 4 or 4s from work a couple years ago after no one claimed it. I never touched it until now just looking through it. Well the Sim is locked ofcourse and there's no password on it. All I want to do is play games so what would happen if I put in the wrong PUK 10 times? Can it erase everything? Will it notify the carrier? Will it entirely lock me out? What happens if I factory set?
  • No Service on iPhone 3 when entering a new sim card? I'm trying to set up this iPhone for my uncle. My mom gave it to him for Christmas, it was hers. It's in perfect condition and everything. I restored it, reset network settings 3 times. But I'm still getting the "No Service" thing. Is there any way to fix this without contacting his service provider? AT&T, by the way. Not a faulty sim card, either.
  • My Eyes Gets Tired Whenever I Use iPhone I don't know why but recently when I use iPhone, my eyes become really tired. It wasn't like this before. Even when I watch tv. It's not like I'm using iPhone for a long time since this started happening. What should I do?
  • Is it possible for an entering college student to realistically survive without a smartphone? (Ranting WELCOME)? I currently have a smartphone (iPhone SE) that is badly cracked, and I've gotten the opportunity to get a new one, which happens to be, a dumbphone. I'm entering college in a few days, with a super high powered, functions I'll probably never use laptop, could I realistically survive in college without a smartphone? Please give the hard truth REAL details… Feel free to rant!