You can create arbitrary sticker packs all you want from within the Telegram client using one of Telegram's own bots (Stickers, similar to BotFather for creatin

You can create arbitrary sticker packs all you want from within the Telegram client using one of Telegram's own bots (Stickers, similar to BotFather for creating bot accounts). I've made a few myself. Unless Telegram promotes them in the stickers section, they have to be shared manually after that. Telegram itself does not prevent you from making any sticker pack you want.