This I have to admit confused me a bit the first time I saw it.
Simply that each tab shows up as their own entity in Recent apps. Which can be slightly confusing when you’re looking for Chrome there.
But, it’s rather easy to sort out. Inside the Chrome app > 3 dot menu > Settings > Merge tabs and apps, set it to OFF. It also turn off the Chrome colour themes that Chrome supports, just look at the screenshots.
That’s it, now you’ve got a tab switcher inside Chrome. As it used to be. Or merge it back to apps if it feels boring.