Subscriptions – Offer premium access via Telegram’s Payment API.
In-App Purchases – Sell virtual goods or upgrades.
Ads – Display Telegram Ads or third-party networks.
Affiliate Marketing – Promote partner products.
Donations – Accept user contributions via payment gateways.
You can also read this post on this topic https://propellerads.com/blog/adv-how-to-monetize-telegram-mini-apps/