Google has confirmed that its upcoming Chrome 138 browser update will be the last version to support macOS Big Sur. Going forward, Chrome 139

You need a browser that gets security updates. If you're still using macOS macOS Big Sur, soon your only choices will be Firefox and Microsoft Edge.

Macs with macOS 11 will still be able to run the last supported version of Chrome, but users will receive a warning stating that their OS is no longer supported, precluding any further updates. Those who want to keep up with Chrome's latest versions will have no choice but to update their Mac to macOS 12 or later.