The first version of Android supporting applications created in 64-bit architecture was Android 5.0 Lollipop, which appeared on the market almost 6 years ago. Despite the fact that currently almost every smartphone on the market supports 64-bit applications, Google hasn't decided to update its flagship Chrome browser to the 64-bit version for Android. However, this situation will change.
The latest beta versions of Chrome applications numbered 84, 85 and 86 were created as 64-bit applications and are now available to a limited group of users. Probably stable versions of the application will not change in this respect. Importantly - the latest versions of Google Chrome in 64-bit architecture only work on Android 10. The application itself compared to the 32-bit version doesn't differ in many details, and the main difference is better browser performance in 64-bit version.