Uknown networks

When exploring my iPhone 11 under edit Wi-Fi I found two networks I have never connected to. One was labeled DATA_TRANSFER_NETWORK with pw of (Showm3MYdat@) and NETGEAR23 with pw oddfire349. I did delete them as soon as I saw them. I have never connected to these networks. I only just started using my Wi-Fi couple months ago. I had always used data. I got my phone new out of the box from T-Mobile and again, have only connected to my personal Wi-Fi. The only time my phone has been out of my sight is when I have been asleep.

The second odd thing I noticed today was when I logged into the apple site with my phone using the keychain my password in the keychain was wrong by 1 character but I was still able to log in to the site. I tried that password on the apple site on my pc and it did (not )work.

Last, a couple months ago I went to send a photo to a friend. I never use airdrop but I noticed when I went to send the picture it was in Airdrop. I quickly turned that off.

I have changed my Wi-Fi password, turned on face recognition and changed the passcode on my phone. I have checked all my apps and I only see the ones I have installed.

Can unknown apps still be installed and hidden in the bottom of the phone where the mail and safari are. I know you used to be able to add a app and it would disappear down there. My phone is not jail broke and I continue to update the IOS. I also have 2 apple IDs and what bothers me is when I have changed the password after a few days they do not work anymore. I have check for any trusted devised that I have not used but only see my iPhone or my pc.

Thanks for any input.