Please send me examples of multiple frontend dapps that use the same smart contract?

Uniswap actually has multiple frontend. If Im not mistaken, Horswap is one:

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Uniswap actually has multiple frontend. If Im not mistaken, Horswap is one:
https://1.horswap.eth.limo/

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Ho. Can you send me a few examples for the Safe contract?

Safe has many frontends

Uniswap does as well

Probably lots more examples

Why does it have to be frontend? Usually one good frontend is good enough. You have uniswap.org, it works, people trust it. On the other hand, there are (hundreds? thousands?) apps that use uniswap's smart contracts, including aggregators like matcha, smart wallets, bots, etc.