Bitcoin has a limited scripting language in which security is prioritized over programmability.

There are smart contract sidechains, including Rootstock (which is EVM-compatible). The Liquid network sidechain has smart contracts which are used for asset issuance and governance. Stacks is a blockchain that ties its concensus to bitcoin and has smart contracts. RGB is a layer2/layer3 technology that provides smart contracts, to some degree. Even Lighting network can be described as using "multisig smart contracts".

Here's an article that discusses the scripts and smart contracts available with Bitcoin:

What Are Bitcoin Smart Contracts? https://river.com/learn/what-are-bitcoin-smart-contracts

And here's one other article:

5 Projects Enabling Smart Contract Development on Bitcoin https://cryptonews.com/exclusives/5-projects-enabling-smart-contract-development-on-bitcoin.htm

All of these have posts with discussion here on SN.