Can a UTXO Transaction Be Replayed on a Sidechain?

A UTXO transaction signed on the main chain could potentially be replayed on a sidechain if the sidechain uses the exact same cryptographic hash function and signature scheme, and does not include a unique chain ID or other differentiating data in the signed transaction. Sidechains, however, are designed with specific replay protection mechanisms, such as peg-in/peg-out processes that involve unique, sidechain-specific transaction data to prevent this exact type of cross-chain attack.