A payment-bot example for product sellers: Mini App catalog, variants, cart, Nova Poshta or courier, Mono / LiqPay / Stripe, fiscal receipt, and order statuses in the chat.
A payment-bot example for recurring revenue: monthly invoices or Stripe subscriptions, grace period on failed charge, revoke channel access, and a dunning message that is not a human in Direct.
A site is not a status page. For an SMB it is a 24/7 sales desk, a Google listing you own, and a way to grow the number of people who actually order - not only those who already know you from a feed.
An MVP can be a form. A SaaS is a product many companies rent. How I would design tenancy, subscriptions, onboarding, and ops - and what I would not copy from big platforms in year one.