IPhone 12 Pro saved passwords and login info.

I recently turned off everything in iCloud and signed out, as I had never signed in but it had started uploading my photos since February 2, 2022, I discovered, and I suspected Siri settings in iCloud were interfering and causing Siri to drain battery in the last few months. Since I never signed into iCloud on my iPhone, especially recently, I have no idea why it started uploading photos since February 2, (unless an update did that stealthily, as it occasionally also turns on other settings on my iPhone that I had turned off), but I shut off Photos and deleted them from iCloud--the full versions were already on my phone. I signed out of iCloud and I was given the option to save Keychain data on my phone, but I did not. Now I see there is no autofill for starting to enter an email, etc., although auto fill is turned on, and I couldn't figure out how to restore the login info even when I signed into iCloud again--there was no restore function. I signed out again and it gave me the option to save the info again on my phone but it didn't restore them. I'm going to have to reenter everything again as the situation comes up, but it doesn't seem to be saving the login information on my phone. Will Keychain or Passwords save my information on my iPhone like MacBook does on the computer, when I don't use or have signed out of iCloud?