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.
Just out of curiosity: which do you think is closer to Python? Kotlin or Swift?
Not knowing wither, my hunch would be to say Kotlin. But I am curious.
I’ve never used swift myself, but as far as I’m aware swift doesn’t need to have a main function so I’d say it’s closer