from aiogram.types import InlineKeyboardButton, InlineKeyboardMarkup
from aiogram.utils.keyboard import InlineKeyboardBuilder

placeholder_kb: InlineKeyboardMarkup = InlineKeyboardBuilder(
    [[InlineKeyboardButton(text="🍃", callback_data="...")]]
).as_markup()

return_menu: InlineKeyboardMarkup = InlineKeyboardBuilder(
    [[InlineKeyboardButton(text="⬅️ В меню", callback_data="menu:main")]]
).as_markup()