The receiver most likely has seen the coins and possibly just lieing as Charles-Tim said. Is it a business or just someone you are familiar with. If it's the first, it's most likely a scammer trying to play you to resend coins. If it's someone you are familiar with, you can ask him if there's an error in his end. Ask him to update his wallet, if it's a hot wallet app..

I did a little check using block explorer, and I'll assume this to be your main bc1qytp53lrew7m92damkw0slzj4pgcgr599nxkavh UTXO and input, that leaves these two as your outputs

bc1qzgga4qteepkvr79ulka5f3luqdvc9y03r363f0
bc1qkua5fjthxchn23w5cgqfx38a5d9cfzvrg87cju

The first output, is the address you were to send the coins to, bc1qzgga4qteepkvr79ulka5f3luqdvc9y03r363f0

please correct me if I'm mistaken... This is your change address,(output returns the remaining balance back to your wallet.)
bc1qkua5fjthxchn23w5cgqfx38a5d9cfzvrg87cju

It shows clearly on the blockchain that the coins on this address bc1qzgga4qteepkvr79ulka5f3luqdvc9y03r363f0 has been spent on the very day of confirmation.

Check here to see for yourself

https://www.blockchain.com/explorer/addresses/BTC/bc1qzgga4qteepkvr79ulka5f3luqdvc9y03r363f0



So it's most likely you are being played.

Did you send it to the correct address? Check the address again and again to confirm that the address is correct.

Can you let us know the txid?

Which wallet is the receiver using? Or an exchange?

Sometimes scammers will tell you that they have not received the coins but which they actually received.