The myColorado app is great as it stores a legal ID (except for police interactions???) as well as insurance and vaccine info. Colorado also supports the Apple wallet implementation, which is absolutely useless. The Apple wallet version can only be used at an airport, but when when I tried to use it at DIA the TSA officer just said “no”. I think Apple may be the one who is doing it wrong…
I purchased a used iPhone SE 2 for my son from Amazon for $140. This phone had a brand new battery and the screen and back glass are flawless. I was very impressed.
However, if you love the iPhone SE 1, I think that the iPhone 13 mini would replace it well. You would keep the squared off aesthetic, but gain a lot of usable screen real estate. The latest iPhone SE phones are the same size as an iphone 6, and similar to the mini, but they have lower end features and the round aesthetic. The only deal breaker I see is that the SE phones have touch ID rather than Face ID. Not sure which she would prefer. (I would love to have both!)