At the moment, all smart contracts are designed and build by the EBSI team.

Any Ethereum-compliant development stack can be used to develop EVM-compliant smart contracts.

Developers can use scaffold.eth (or any other similar framework) to build EVM-compliant smart contracts.

Are there compliance requirements for wallets/apps to adhere to? Yes, but the compliance track is still in progress.

Are the apps implemented as Dapps or is it different? EBSI consists of both dApps and classical, non-blockchain services.