@dp.callback_query_handler(text='registration')
async def inline_kb(query: types.CallbackQuery):
    answer_data = query.data
    if answer_data == 'registration':
        send_name(query.message) #Coroutine 'send_name' is not awaited



async def send_name(message):
    await Form_registration.name.set()
    await message.answer("Укажите логин: ", reply_markup=types.ReplyKeyboardRemove())