Testnet faucets that are lively as I know.

https://bitcoinfaucet.uo1.net/
https://kuttler.eu/en/bitcoin/btc/faucet/
https://coinfaucet.eu/en/btc-testnet/
https://tbtc.bitaps.com/

You can buy Bitcoin Testnet too if you are very demanding and greedy to have it but I don't buy it.
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