While trying to calculate some on-chain metrics, I stumbled upon a cornerstone case that I do not know how to handle. When spending a UTXO, the change will be returned to the person who initiated the transaction, but the address is different. For instance, I have a UTXO of 15 BTC and I want to send 1 BTC to person X. There will be two transactions, one for 1 BTC to that person and the rest minus the fee back to me under a new address. Is there a way to detect 'change' transactions' and if so, how? Thanks

Hello all,
Can someone explain to me why there are coinbase txs that send rewards to multiple addresses like this one https://bitcoinblockexplorers.com/tx/eb9014398ae470d3e7ab178d6751865b83a12d78dae8ca16fe450ae3d27907c8 ? Thanks in advance