How do you know?
Seriously, 1) fakes have always been a thing (cheap things recycled but sold as “new”, more expensive things relabeled), and 2) there’s a major semiconductor shortage right now making it lucrative to relabel also cheap stuff, and 3) multiple forum members have gotten fake TL07x ICs from Aliexpress over the last year. I got recycled chips from a usually reliable eBay seller just a few weeks ago.
You don’t have to defend the Aliexpress and eBay sellers, they’re not your friends, and their supply chains don’t provide much traceability (usually zero traceability once it reaches the store).