1infinitelo Charge solved
Like many others, I ended up with a charge on my checking account associated with my Apple Cash card that didn't look right. In my case it was for $8.45 that I supposedly sent to someone via apple cash. I hadn't done that and was quite concerned that someone had hacked my checking account debit card.
I had, however, sent $20 to someone on that same day. It turns out this was a legit charge because my apple account associated with the apple card had only $11.55 in it, so the person was sent that along with $8.45 from my checking account to make a total of $20.
I found this out after a lot of searching on the web for this answer and coming up short, and then about 30 min on a call with apple support, and then another 10 min on a call with "Green Dot Bank" (who manages the apple cash for apple - 866 795 7597). After speaking with Green Dot support, I went to my Apple Cash card on my iPhone, and then clicked on the $20 transaction on the date in question, and I could clearly see the split transaction - issue resolved.
I post this here for others because if I could have found this info, I could get about 2 hours back in my life.
Simply put, click on the Apple Cash transaction on the date of the charge in question and look for a split transaction that matches the 1infinitelo transaction amount.
You're welcome...