When it comes to mobile apps, I generally recommend native (swift/kotlin) or Flutter, they all have good tooling and have good performance
In this case though, they are all curly braces languages and don't have much in common with python.
If you don't want to learn at least 1 new language, there are some python libraries/frameworks which can be used for mobile dev. Like Kivy or Beeware. I've never used any of these though so I can't tell you how good/bad they are.
Kotlin and Swift have similar syntax and neither are like Python to be honest. If I were to pick one, Kotlin all the way. You can do a fair amount of back-end work with itas well.
Even in python, writing code at the top level is not recommended for any non-trivial project. I mean, you might as well say "kotlin is closer to python because they both end with N". Neither method of comparison offers any value to OP.
And I said, if op doesn't want to learn a new language, here are some python mobile frameworks. And was explicitly asked which of kotlin/swift I would recommend for a python dev.