Retrofit and coroutines with the PokeApi don't work for me

I try to make a recycler view with the name and picture of the pokemon, but it doesn't work, I don't understand why, the requests are not done because the pokemon list is never filled. I make a loop for calls because what I want is the name and picture of the pokemon, because when I ask for a list of pokemon objects only bring the name and the url of the complete object and is the best way that has occurred to me, I would appreciate if you can give me a hand, thank you very much.

This is the code of my mainActivity:

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    binding = ActivityMainBinding.inflate(layoutInflater)
    setContentView(binding.root)

    initRecycler()
    obtenerPokemons()

}


private fun initRecycler(){
    pokemonAdapter = PokemonAdapter(pokemons)
    linearLayoutManager = LinearLayoutManager(this)
    binding.recyclerpokemon.apply {
        setHasFixedSize(true)
        layoutManager = linearLayoutManager
        adapter = pokemonAdapter
    }

}


private fun obtenerPokemons() {
    for (i in 1..30)  {
        searchByName(i)
    }

    pokemonAdapter.setPokemons(pokemons)
}


private fun getRetrofit(): Retrofit {
    return Retrofit.Builder()
        .baseUrl("https://pokeapi.co/api/v2/")
        .addConverterFactory(GsonConverterFactory.create())
        .build()
}

private fun searchByName(query:Int){
    CoroutineScope(Dispatchers.IO).launch {
        val call = getRetrofit().create(PokemonService::class.java).getPokemon("pokemon/$query")
        val pokemonsResp = call.body()
        runOnUiThread {
            if(call.isSuccessful) {
                pokemons.add(pokemonsResp)
            }else{
                Toast.makeText(this@MainActivity, "No encuentro eso", Toast.LENGTH_SHORT).show()
            }
        }
    }
}

}

This is the pokemon object code:

data class Pokemon (
    @SerializedName("id"                       ) var id                     : Int,
    @SerializedName("name"                     ) var name                   : String,
    @SerializedName("sprites"                  ) var sprites                : Sprites,
    )
data class Sprites (
    @SerializedName("back_default"       ) var backDefault      : String,
    @SerializedName("front_default"      ) var frontDefault     : String,
    )

And this is the code of my service:

interface PokemonService {
    @GET
    suspend fun getPokemon(@Url url:String) : Response<Pokemon?>
}