Would you say Americans have their “own” Spanish accent?

Just having a conversation with a few friends from Spain and I asked them if I had any sort of accent (I’m B2). They said I have an “American” Spanish accent. I can speak Spanish good and I have good pronunciation but they just said I have the accent. So…what is an American Spanish accent to you? I guess it would make sense because the US has over 40m Spanish speakers so it’d be normal for the US to have its own distinct accent and I know that LatAmericans call it a gringo accent.

But there has to be some sort of difference between how an American like me speaking and one that doesn’t know Spanish, right?

They said I talk more slow and Americans are really hard with their “R’s” (which is ironic because I have a Boston accent lmao).

It’s my second language but to be fair I started learning when I was 5y (33 now). So I don’t t