It’s $10 that went from your account to a specific place. And depending on what they know about that place that can give trackers information about you that you don’t want them to have - including information that is untrue or you didn’t know but may be assumed to know (or at least not assumed to not know)

“Receiver
Senders may jeopardize their privacy when sending payments if they’re not careful, but receivers are even more exposed. It all begins with the invoice, which has the receiver’s public key embedded in it. Everyone with access to an invoice can easily discover the associated node.” - and keep in mind that Strike has the invoice you used to send the money

https://voltage.cloud/blog/lightning-network-faq/lightning-network-privacy-explainer/