Isn’t there a way you can check for funds received on the blockchain?

I used cashapp to buy some BTC, bought it several times and transferred my funds to electrum no issue.

Well I was buying something and the seller hasn’t received the funds yet even though they have left cashapp already. I know they’re not scamming me because I have bought from them before with no issue.

What I did differently though is sent straight from cashapp to their wallet because I didn’t have my laptop on me to send to my wallet first, and I received a text yesterday saying it was confirmed on the chain but yeah seller claims they haven’t received funds yet, and thinks perhaps it is still mining. They said they think it’s the network cashapp uses that’s slowing it down.

Is there anyway I can confirm? I know the address was correct. I heard there was a way to trace transactions if you had the wallet address, which I do, though. Is that true?