Greetings,
What is the best approach to implement an iOS style TextField? See image:

But when I use a Flutter TextField, I get this (of course, Material Design style, using a "blue" theme primary color):

I plan to use this style for my Android app, but this is not acceptable to iOS users, therefore I plan to conditionally render it as close to iOS as possible.
My questions:
1. Do you have an example of how to disable the underline effect?
3. Is it a pain to get the blinking cursor iOS style? (thickness, color, even slight fade in/out?)
P.S. In my opinion, I feel like I'm not offering a quality UX for iOS users if I use Material Design style over the familiar iOS style. Material Design is great for Android apps / the web but I feel iOS users will feel the app isn't high quality if it's not iOS style.
Thanks in advance!