recently purchased Apple TV from Apple Store online but not able to find this recent purchase in my account order history

That is exactly how I interpreted your reply. However, as this is user-to-user forum, we here have no access to information or tools to rectify this. You will have to contact Apple Store staff about it, as described in my previous reply. Good luck!

Is this about the purchase or the streaming box, or the streaming service?

When asked for your email during checkout or earlier, did you enter your Apple ID account? Else the purchase may not be linked to this Apple ID account.

To go over this with a someone from the Apple staff that has access to such records,

please use a number from this page: How to contact us - Apple (US)

or its equivalent for other countries or regions: https://www.apple.com/%%/contact/, where %% is the two-letter country code.